While the design and display specifications of the iPhone Duo and Xiaomi 18 Fold appear nearly identical on the surface, significant differences emerge upon closer inspection. Both devices feature a 7.6-inch inner display when unfolded and a 5.4-inch outer screen when folded, each supporting a 120Hz refresh rate. However, Xiaomi asserts its foldable achieves a peak brightness of 4,000 nits, surpassing Apple’s 3,000-nit limit, potentially offering better visibility in bright environments. Additionally, the iPhone Duo incorporates a nano-textured layer to minimize glare and reduce the visibility of the screen crease, while its front-facing camera is concealed beneath the display, activating only when required.
Build materials also diverge between the two competitors. Apple has opted for a titanium frame paired with Ceramic Shield glass to enhance durability, complemented by an IP68 certification for water and dust resistance. In contrast, the Xiaomi 18 Fold utilizes an aluminum frame and Shield Glass 3.0. Xiaomi has not provided an IP rating for its device, which raises concerns given the inherent fragility associated with foldable technology.
Performance metrics present a mixed comparison as well. The Xiaomi 18 Fold holds a weight advantage at just 219 grams, significantly lighter than the iPhone Duo’s 254 grams. This 35-gram difference may enhance comfort during prolonged use. Internally, both phones rely on proprietary silicon; the iPhone Duo is driven by the A20 Pro, Apple’s first mobile chip built on a 2-nanometer architecture for improved efficiency, whereas the Xiaomi 18 Fold uses the XRING O3, which remains on 3-nanometer technology. Furthermore, the Xiaomi device offers 16 GB of RAM compared to the Duo’s 12 GB, a distinction that may impact performance during intensive gaming and AI workloads.
The A20 Pro being the first 2nm chip is impressive, but 16GB RAM on the Xiaomi gives it an edge for multitasking.
Xiaomi lacks an IP rating? That is a huge red flag for a fragile foldable. I would not touch it near water.
219g versus 254g is a massive difference for a daily driver. Weight matters more than specs on a foldable.