Between the Z70 Ultra and MIX Fold 4, the Z70 Ultra comes out ahead in antutu / battery capacity, while the MIX Fold 4 wins on wireless charging / front camera. Overall, the Z70 Ultra scores 75.1 and the MIX Fold 4 scores 71.4 on our Mars Score.
Which should you buy?
The Z70 Ultra edges ahead on the Mars Score (75.1 vs 71.4), but the 3.7-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Z70 Ultra if your top frustration with your current device is running out of charge before the day ends — endurance is the lead spec here. The biggest gaps in its favor are antutu, battery capacity, refresh rate, among others.
Pick the MIX Fold 4 if you photograph or shoot video regularly and want the better imaging pipeline of the two. Its strongest claims are wireless charging, front camera, screen size, among others.
Both ship with comparable ram, main camera, 5g support, so those specs do not separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Why Nubia - Z70 Ultra wins
- ▲AnTuTu — 29.41% more. 2640000 vs 2040000.
- ▲Battery capacity — 20.59% more. 6150 mAh vs 5100 mAh.
- ▲Refresh rate — 20.00% more. 144 Hz vs 120 Hz.
- ▲Wired charging — 19.40% more. 80 W vs 67 W.
Why Xiaomi - MIX Fold 4 wins
- ▲Wireless charging — 233.33% more. 50 W vs 15 W.
- ▲Front camera — 25.00% more. 20 MP vs 16 MP.
- ▲Screen size — 16.50% more. 7.98 " vs 6.85 ".
- ▲Pixel density — 3.61% more. 402 ppi vs 388 ppi.
- ▲Weight — 1.00 g less. 226 vs 227.
- ▲Water resistance: IPX8 (vs IP68).
- ▲Promised OS updates: 4 (vs 3).
Spec comparison
Design
| Spec | Nubia - Z70 Ultra | Xiaomi - MIX Fold 4 |
|---|---|---|
| Weight | 227 g | 226 glead |
| Thickness | 8.7 mmlead | 9.47 mm |
| Water resistanceⓘ | IP68 | IPX8lead |
| Form factor | bar | foldable_booklead |
Display
| Spec | Nubia - Z70 Ultra | Xiaomi - MIX Fold 4 |
|---|---|---|
| Screen sizeⓘ | 6.85 " | 7.98 "lead |
| Pixel densityⓘ | 388 ppi | 402 ppilead |
| Refresh rateⓘ | 144 Hzlead | 120 Hz |
| Peak brightnessⓘ | 2000 nits | 3000 nitslead |
Performance
Cameras
| Spec | Nubia - Z70 Ultra | Xiaomi - MIX Fold 4 |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 16 MP | 20 MPlead |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | Nubia - Z70 Ultra | Xiaomi - MIX Fold 4 |
|---|---|---|
| Battery capacity | 6150 mAhlead | 5100 mAh |
| Wired chargingⓘ | 80 Wlead | 67 W |
| Wireless chargingⓘ | 15 W | 50 Wlead |
Connectivity
| Spec | Nubia - Z70 Ultra | Xiaomi - MIX Fold 4 |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | Nubia - Z70 Ultra | Xiaomi - MIX Fold 4 |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 3 years | 4 yearslead |
Frequently asked
Which has better battery, Z70 Ultra or MIX Fold 4?+
Z70 Ultra has 20.6% more battery — 6150 mAh vs 5100 mAh.
Which is lighter, Z70 Ultra or MIX Fold 4?+
MIX Fold 4 is 1g lighter — 227g vs 226g.
Is Z70 Ultra waterproof?+
Z70 Ultra has an IP68 rating.
Does MIX Fold 4 support 5G?+
Yes, MIX Fold 4 supports 5G.
Which has a better camera, Z70 Ultra or MIX Fold 4?+
MIX Fold 4 has a 50 MP main camera vs 50 MP.
Spec-level deep dives
More from the same brands
vsMars is reader-supported. When you buy through links on our site, we may earn an affiliate commission at no extra cost to you. Learn more.