Between the Razr 50 Ultra and MIX Fold 4, the Razr 50 Ultra comes out ahead in front camera / refresh rate, while the MIX Fold 4 wins on wireless charging / wired charging. Overall, the Razr 50 Ultra scores 65.6 and the MIX Fold 4 scores 71.4 on our Mars Score.
Which should you buy?
The MIX Fold 4 edges ahead on the Mars Score (65.6 vs 71.4), but the 5.8-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Razr 50 Ultra if you photograph or shoot video regularly and want the better imaging pipeline of the two. The biggest gaps in its favor are front camera, refresh rate, weight, among others.
Pick the MIX Fold 4 if you push the hardware — gaming, on-device AI, heavy multitasking — and the extra compute headroom is worth the trade-offs. Its strongest claims are wireless charging, wired charging, ram, among others.
Both ship with comparable main camera, 5g support, water resistance, so those specs do not separate the two — focus on the differences below.
Bottom line: the MIX Fold 4 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Motorola - Razr 50 Ultra wins
- ▲Front camera — 60.00% more. 32 MP vs 20 MP.
- ▲Refresh rate — 37.50% more. 165 Hz vs 120 Hz.
- ▲Weight — 37.00 g less. 189 vs 226.
- ▲Pixel density — 2.74% more. 413 ppi vs 402 ppi.
Why Xiaomi - MIX Fold 4 wins
- ▲Wireless charging — 233.33% more. 50 W vs 15 W.
- ▲Wired charging — 48.89% more. 67 W vs 45 W.
- ▲RAM — 33.33% more. 16 GB vs 12 GB.
- ▲Battery capacity — 27.50% more. 5100 mAh vs 4000 mAh.
- ▲AnTuTu — 26.71% more. 2040000 vs 1610000.
- ▲Screen size — 15.65% more. 7.98 " vs 6.9 ".
- ▲Promised OS updates: 4 (vs 3).
Spec comparison
Design
| Spec | Motorola - Razr 50 Ultra | Xiaomi - MIX Fold 4 |
|---|---|---|
| Weight | 189 glead | 226 g |
| Thickness | 7.1 mmlead | 9.47 mm |
| Water resistanceⓘ | IPX8 | IPX8 |
| Form factor | foldable_clamshelllead | foldable_book |
Display
| Spec | Motorola - Razr 50 Ultra | Xiaomi - MIX Fold 4 |
|---|---|---|
| Screen sizeⓘ | 6.9 " | 7.98 "lead |
| Pixel densityⓘ | 413 ppilead | 402 ppi |
| Refresh rateⓘ | 165 Hzlead | 120 Hz |
| Peak brightnessⓘ | 3000 nits | 3000 nits |
Performance
Cameras
| Spec | Motorola - Razr 50 Ultra | Xiaomi - MIX Fold 4 |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 32 MPlead | 20 MP |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | Motorola - Razr 50 Ultra | Xiaomi - MIX Fold 4 |
|---|---|---|
| Battery capacity | 4000 mAh | 5100 mAhlead |
| Wired chargingⓘ | 45 W | 67 Wlead |
| Wireless chargingⓘ | 15 W | 50 Wlead |
Connectivity
| Spec | Motorola - Razr 50 Ultra | Xiaomi - MIX Fold 4 |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | Motorola - Razr 50 Ultra | Xiaomi - MIX Fold 4 |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 3 years | 4 yearslead |
Frequently asked
Which has better battery, Razr 50 Ultra or MIX Fold 4?+
MIX Fold 4 has 27.5% more battery — 4000 mAh vs 5100 mAh.
Which is lighter, Razr 50 Ultra or MIX Fold 4?+
Razr 50 Ultra is 37g lighter — 189g vs 226g.
Is Razr 50 Ultra waterproof?+
Razr 50 Ultra has an IPX8 rating.
Does MIX Fold 4 support 5G?+
Yes, MIX Fold 4 supports 5G.
Which has more RAM, Razr 50 Ultra or MIX Fold 4?+
MIX Fold 4 offers 16GB of RAM.
Which has a better camera, Razr 50 Ultra or MIX Fold 4?+
MIX Fold 4 has a 50 MP main camera vs 50 MP.
Spec-level deep dives
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