iPhone Duo vs vivo X500 Pro Max

Build and design

The Duo is a foldable with a hinge, an inner display that unfolds flat and an outer display for quick use, at 254g, 5.2mm unfolded and 11.3mm folded. The vivo is a larger slab at 6.85 inches, with a ZEISS camera island and a 200MP telephoto that dominates its back. Both phones feel premium, but only the Duo becomes a small tablet, while the vivo is a simpler, more durable slab with no hinge or crease concern.

If you want the newest form factor and accept foldable compromises, the Duo wins on novelty. If you want proven slab durability and a larger battery, the vivo wins. For most buyers, the slab is the safer choice, unless multitasking on a larger inner display is a priority.

Display and benchmarks

The Duo offers a 7.6-inch inner display at 1878 x 2670 and a 5.4-inch outer display at 1398 x 2034, both ProMotion and Always-On, with up to 3,000 nits in one listing. The vivo offers a single 6.85-inch 2K ZEISS display with 1–144Hz. For reading, split-screen work and video, the Duo's inner display is larger, while its outer display is smaller and narrower than the vivo's main display for everyday use.

On benchmarks, the Duo uses A20 Pro and the vivo uses Dimensity 9600 Pro on 2nm, so no speed winner is claimed between them — a controlled side-by-side benchmark between these two phones was not reviewed. Both chips are flagship designs, and any real-world difference would come from software and cooling, not from a generational gap. For gaming, the Duo's larger screen is more immersive, while the vivo's slab is easier to hold for long sessions.

Cameras and video

The Duo offers dual 48MP cameras, a Fusion main and a Fusion ultrawide, with no telephoto, plus a 12MP Centre Stage front camera. The vivo offers a 50MP main at 1/1.28-inch f/1.57 with gimbal OIS, a 50MP ultrawide and a 200MP ZEISS APO telephoto at 1/1.4-inch, 85mm and CIPA 7.0, with an optional 400mm ZEISS extender, plus 8K30 and 4K120 Pro AF Tracking. On paper, the vivo wins on megapixels, ultrawide and telephoto, while the Duo wins on simplicity and Apple video pipeline.

No controlled side-by-side camera test between these two phones was reviewed, so no photo winner is claimed beyond the hardware gap. If you shoot zoom often, the vivo is stronger on paper. If you shoot video and want Apple's ProRes pipeline, the Duo is stronger on paper. For everyday photos at 1x, both should be close, despite the megapixel gap.

Battery, software and price

Battery is where the vivo wins on paper, with 6,750mAh in Europe and 90W wired and 40W wireless charging, versus a reported 5,400mAh dual-battery system for the Duo in one comparison table — a figure that is not an Apple disclosure, so treat it as reported, not official. For most users, the vivo will last longer on paper, while the Duo's battery will vary with inner versus outer use. Charging is faster on the vivo on paper, though real-world charging should be checked in reviews.

Software is iOS 27 on the Duo, with foldable multitasking and, in reports, a side Touch ID button, while the vivo runs OriginOS 7 on Android 17 with ZEISS tuning. In Europe, both are on sale, with the Duo at €2,299 in Germany and the vivo from €1,599 — a €700 gap at 256GB, with the Duo costing more despite less camera hardware. In the US, only the Duo is officially sold, from $1,999.

Verdict

Buy the iPhone Duo if you want a foldable in the US from $1,999 or in Europe from €2,299 in Germany. Buy the vivo X500 Pro Max if you want a 200MP ZEISS telephoto slab in Europe from €1,599. For most European buyers, the vivo is the smarter camera buy — the Duo is for foldable enthusiasts.