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A trend in foldable screens has become very obvious this year: the old, narrow and long large foldables are gradually getting wider. Huawei took this path quite early. Last year, the Pura X directly featured a 16:10 inner screen, turning the “wide foldable” into a clear product direction; this year, the Pura X Max expanded the inner screen to 7.7 inches.

Now Samsung, Apple, and Xiaomi are also readjusting the aspect ratios of their foldable screens. The Galaxy Z Fold8 is wider than its predecessors, while the Xiaomi 18 Fold simply calls this form factor a “mid-fold,” with inner and outer screens adopting an aspect ratio close to √2:1; Apple, making its first foldable, also didn’t stick to the narrow and long design for the iPhone Duo.

They don’t use the same folding method, but their philosophies are very similar: make it not too awkward to use when folded, and ensure the large screen is better suited for reading, video, and multitasking when unfolded. Putting the Huawei Pura X Max, iPhone Duo, Xiaomi 18 Fold, and Galaxy Z Fold8 together, whose understanding of the “wide foldable” is more mature? Let’s compare them directly.

Design

These four devices actually share a very obvious commonality now: they have all become shorter and wider when folded, basically the size of a passport. And on this path, Huawei is indeed the pioneer.

In 2025, the Pura X truly brought the 16:10 “wide fold” to the market for the first time, a completely different approach from the thin and long large-fold devices of that time. This year, the Pura X Max continues in this direction, measuring 120×85mm when folded, which is already a very typical passport size.

Looking at this year’s iPhone Duo, Xiaomi 18 Fold, and Galaxy Z Fold8, you’ll find that the directions are becoming increasingly similar. The Duo measures 117.8×84.1mm when folded, Xiaomi 18 Fold is officially described as “the size of a passport when closed”, and the Fold8 has also shrunk to 123.9×81.9mm.

So looking back at the Pura X’s original “wide fold” design now, it is indeed quite interesting. A form factor that seemed very unique two years ago has already started to become the common direction for large foldables this year.

Dimensions and Weight

Although all four are short and wide passport-style foldables, the difference in dimensions and weight is quite noticeable when placed side by side. The Huawei Pura X Max measures 120 × 166.5 × 5.2mm when unfolded, 120 × 85 × 11.2mm when folded, and weighs 229g.

The iPhone Duo is very similar to it, measuring 117.8 × 164.6 × 5.2mm unfolded and 117.8 × 84.1 × 11.3mm folded. However, the 254g weight is indeed a bit heavy in the hand, making it the heaviest among the four.

The Xiaomi 18 Fold is significantly lighter, with an unfolded thickness of 5.02mm, a folded thickness of 10.68mm, and a weight of 219g. These specs are already very well-controlled for a foldable screen device.

But Samsung went even further this time. The Galaxy Z Fold8 is only 4.5mm when unfolded and 9.7mm when folded, with its weight even being pushed down to 201g. Among the four devices, it is not only the lightest but also the thinnest.

The Xiaomi 18 Fold is already quite slim and light, but Samsung has gone a step further. Looking at the iPhone Duo from the opposite perspective, its thickness is actually well-controlled, but the real drawback is its weight of 254g.

Display

All four are passport-style wide foldables, and the screen sizes are very competitive. The Huawei Pura X Max has the largest inner screen at 7.7 inches with a resolution of 2584×1828; the outer screen is 5.4 inches with 1848×1264. Both screens support 1-120Hz LTPO, with a peak brightness of 3000 nits for the inner screen and up to 3500 nits for the outer screen. The outer screen uses second-generation Kunlun glass, while the inner screen is UTG.

The iPhone Duo features a 7.6-inch inner display and a 5.4-inch outer display, with resolutions of 1878×2670 and 1398×2034 respectively. Both displays support a maximum refresh rate of 120Hz and a peak outdoor brightness of 3000 nits. A notable feature is the nano-texture coating on the inner display, which is primarily used to reduce reflections and make the crease less noticeable.

The Xiaomi 18 Fold features a 7.58-inch inner screen and a 5.38-inch outer screen, with resolutions of 2364×1672 and 1712×1168 respectively. Both screens support 1-120Hz LTPO technology. The official peak brightness is rated at up to 4000 nits, but this figure was measured under 30% APL conditions, making it somewhat unfair to compare directly with the 3000 nits of the other three devices. The inner screen uses dual-layer UTG, while the outer screen is equipped with Xiaomi Dragon Crystal Glass 3.0.

The Samsung Galaxy Z Fold8 features a 7.6-inch inner screen and a 5.5-inch outer screen, with resolutions of 1848×2448 and 1972×1248 respectively. Both screens support up to 120Hz and 3000 nits of brightness, with the inner screen featuring an anti-reflective coating and a dual-layer titanium shock-absorbing structure underneath.

Putting these four devices together, it’s no longer a matter of whose screen is “much larger.” The size difference is at most a fraction of an inch, and the testing standards for brightness figures aren’t entirely consistent. Rather than just obsessing over whether it’s 4000 or 3000 nits, I’m more interested in seeing the crease, reflections, and which of these short-and-wide aspect ratios actually feels more comfortable in real-world use.

Chipset

Putting these four machines together, the processor lineup is actually quite interesting. The Huawei Pura X Max uses the Kirin 9030 Pro. According to official Huawei data, when paired with HarmonyOS 7, the overall device performance improves by 38% compared to the Pura X. This figure should not be interpreted directly as a 38% increase in chip performance. The standard version comes with 12GB+256GB/512GB, while the Collector’s Edition offers 16GB+512GB and 1TB options.

The iPhone Duo is equipped with the same A20 Pro as the 18 Pro, which is also Apple’s new 2nm chip for this generation. Storage options range from 256GB up to 2TB. As for the RAM, Apple’s official website has not disclosed it, so 12GB is not explicitly stated here.

The Xiaomi 18 Fold debuts the Xuanjie O3, with configurations ranging from 12GB+256GB up to 16GB+1TB, and the 1TB version is even upgraded to LPDDR6. For Xiaomi, this foldable device itself marks the first time the Xuanjie O3 truly enters the premium flagship market.

The Samsung Galaxy Z Fold8 is quite familiar, featuring the fifth-generation Snapdragon 8 Elite (for Galaxy). Both the 256GB and 512GB versions come with 12GB of RAM, while only the 1TB version is upgraded to 16GB.

This round is actually quite interesting. Among the four devices, Huawei, Apple, and Xiaomi have all integrated their self-developed chips into their foldable flagships, whereas Samsung is the only one that continues to use Qualcomm.

Camera

In terms of imaging, the difference between the four models is actually more pronounced than the previous screen and performance differences. The Huawei Pura X Max features a 50MP variable aperture main camera, a 12.5MP ultra-wide camera, plus a 50MP 3.5x periscope telephoto lens and a second-generation Red Maple color camera. Both the inner and outer screens are equipped with an 8MP front camera.

The Xiaomi 18 Fold is even more stacked, featuring a 200MP main camera, a 50MP ultra-wide lens, and a 50MP 3.5x periscope telephoto lens, forming a Leica triple-camera system. Public information currently confirms a 16MP front camera, but whether there is one on each screen or not, I won’t fix this parameter for now.

The iPhone Duo is much simpler. The rear only has a 48MP main camera and a 48MP ultra-wide lens, with no dedicated telephoto. The main camera can achieve 2x optical-quality zoom; the outer screen features a 12MP Center Stage camera, while the inner screen hides the FaceTime camera under the display.

The Galaxy Z Fold8 also features a dual-camera setup, with a 50-megapixel main camera and a 50-megapixel ultra-wide lens. The main camera can also achieve 2x optical-quality zoom. Both the inner and outer screens are equipped with a 10-megapixel front camera.

What truly matters to me, however, is the telephoto lens. Huawei and Xiaomi have both included a 3.5x periscope lens, while Apple and Samsung have completely cut it. This might be understandable for regular phones, but since these are the high-end foldable flagships from each brand, the difference is quite noticeable.

Battery and Charging

When it comes to the battery, the difference between the four models is even more pronounced than the screen. The Huawei Pura X Max features a 5300mAh battery, supporting 66W wired and 50W wireless fast charging. For a 229g device, this capacity is quite substantial.

The iPhone Duo is quite unique; Apple still hasn’t disclosed the specific battery capacity, only confirming a dual-battery design. The official battery life is up to 24 hours under typical usage, up to 44 hours of video playback on the outer screen, and up to 31 hours on the inner screen. Wired fast charging can reach up to 50% in about 20 minutes, while wireless charging takes approximately 30 minutes to reach 50%.

The Xiaomi 18 Fold features a 6000mAh battery, making it the largest among the four devices. It comes equipped with both 67W wired and 50W wireless charging, and the total weight is only 219g. These specs are truly impressive.

The Galaxy Z Fold8 features a 4800mAh battery, the smallest among the four, and comes with a 45W charger in the Chinese retail box. Given its weight of only 201g and a folded thickness of 9.7mm, this trade-off is quite understandable.

Looking at them together, Xiaomi is clearly more willing to allocate space for the battery, while Samsung prioritizes a slim and lightweight design. The iPhone Duo has not announced its battery capacity, so there is no need to rank them solely based on battery life figures for now.

Price

In terms of pricing, the difference between the four models is quite noticeable. Both the Huawei Pura X Max and the Xiaomi 18 Fold start at 10,999 yuan. The four versions of the Pura X Max are priced at 10,999 yuan, 11,999 yuan, 12,999 yuan, and 13,999 yuan, respectively, with the 1TB top-tier model still kept under 14,000 yuan.

The first three tiers of the Xiaomi 18 Fold are also priced at 10,999 yuan, 11,999 yuan, and 12,999 yuan, respectively, with the 16GB+1TB version increasing to 14,999 yuan, and the Ceramic Special Edition priced at 15,999 yuan.

The Samsung Galaxy Z Fold8 starts at a higher price, with the 12GB+256GB model selling for 12,999 yuan, the 512GB version at 14,599 yuan, and the 16GB+1TB model reaching 17,799 yuan.

The iPhone Duo is the most expensive. The 256GB model is already 15,999 yuan, the 512GB is 17,999 yuan, the 1TB is 21,499 yuan, and the 2TB model goes straight to 26,499 yuan.

Starting from 256GB, Huawei and Xiaomi are both 10,999 yuan, Samsung is 2,000 yuan more, and Apple is another 3,000 yuan higher than Samsung. If the capacity is bumped up to 1TB, the Pura X Max at 13,999 yuan is actually the lowest among the four, while the iPhone Duo costs 21,499 yuan, a difference of 7,500 yuan. At this price point, there is no need to explain further whether the Duo is expensive or not.

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