Xiaomi Mix Fold 2 vs vivo X51 5G

Network
2G network

GSM 850, 900, 1800, 1900; CDMA 800, 1900

GSM 850, 900, 1800, 1900; CDMA 800
3G network

HSDPA 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1xEV-DO

HSDPA 850, 900, 1700(AWS), 1900, 2100
4G network

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 34, 38, 39, 40, 41, 42

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 32, 38, 39, 40, 41, 66
5G network

5G band 1, 3, 5, 8, 20, 28, 38, 40, 41, 77, 78, 79 SA/NSA

5G band 1, 3, 7, 8, 28, 38, 41, 77, 78 SA/NSA
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
LTE speed

LTE-A (CA)

LTE-A
GPRS

Yes

Yes
EDGE

Yes

Yes

Display
Display type

Foldable LTPO2 OLED

AMOLED
Physical size

8.02 inches

6.56 inches
Resolution

1914 x 2160 pixels

1080 x 2376 pixels
Pixel density

360 ppi

398 ppi
Display colors

1073741824

16777216
Protection

Schott UTG glass, Corning Gorilla Glass Victus

Scratch resistant
Display features

120Hz, HDR10+, Dolby Vision, 1000 nits (HBM), 1300 nits (peak)

90Hz, HDR10+
Cover display

AMOLED

-
Cover display physical size

6.56 inches

-
Cover display resolution

1080 x 2520 pixels

-
Cover display features

120Hz, HDR10+, Dolby Vision, 1000 nits (HBM), 1300 nits (peak)

-
DxOMark display score

-

87

Hardware
CPU

Octa-core

Octa-core
CPU

Single-core 3.19 GHz Cortex-X2

Single-core 2.4 GHz Kryo 475 Prime
CPU(second)

Triple-core 2.75 GHz Cortex-A710

Single-core 2.2 GHz Kryo 475 Gold
CPU(third)

Quad-core 1.80 GHz Cortex-A510

Hexa-core 1.8 GHz Kryo 475 Silver
Chipset

Qualcomm SM8475 Snapdragon 8+ Gen 1

Qualcomm SM7250 Snapdragon 765G
GPU

Adreno 730

Adreno 620
Memory RAM

12 GB

8 GB
Internal storage

256, 512, 1024 GB

256 GB
Memory card

No

No
Storage

UFS 3.1

UFS 2.1

Main camera
Camera type

Triple

Quad
Main camera

(wide) , 50 MP, f/1.8 , 1/1.56" , 1.0 µm

(wide) , 48 MP, f/1.6 , 1/1.2" , 0.8 µm
(telephoto) , 8 MP, f/2.6 , 45 mm, 2x optical zoom

(periscope telephoto) , 8 MP, f/3.4 , 135 mm, 5x optical zoom , 1/4.0"
123 , (ultrawide) , 13 MP, f/2.4 , 15 mm, 1.12 µm

(portrait) , 13 MP, f/2.5 , 50 mm, 0.8 µm, 1/2.8" , 2x optical zoom
(ultrawide) , 8 MP, f/2.2 , 120˚ , 16 mm, 1/4.0" , 1.12 µm
Primary camera resolution

8190 x 6120 pixels

8000 x 6000 pixels
Primary camera video

8K@24/30fps, 4K@30/60fps, 1080p@30/60/120/240/960fps, gyro-EIS

4K@30fps, 1080p@30fps, gyro-EIS
Primary camera flash

dual LED flash

dual-LED dual-tone flash
Camera features

Autofocus, continuous autofocus, digital zoom, optical zoom, digital image stabilization, optical image stabilization, geotagging, panorama, HDR, touch focus, face detection, face unlock, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, phase detection autofocus, Dolby Vision, Leica Native Dual Quality, super night 2.0

Autofocus, continuous shooting, digital zoom, digital image stabilization, optical image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, macro-mode, phase detection autofocus
DxOMark photo

-

117
DxOMark zoom

-

67
DxOMark video

-

102
DxOMark camera score

-

114

Selfie camera
Selfie camera type

Single

Single
Selfie camera

(wide) , 20 MP, f/2.4 , 27 mm, 1/3.4" , 0.8 µm

(wide) , 32 MP, f/2.5 , 26 mm, 1/2.8" , 0.8 µm
Selfie camera resolution

5184 x 3880 pixels

6528 x 4896 pixels
Selfie camera features

Face unlock, HDR, Dolby Vision

Face unlock
Selfie camera video

1080p@30/60fps, 720p@120fps

1080p@30fps
DxOMark photo

-

82
DxOMark video

-

78
DxOMark camera score

-

81

Connectivity
WLAN

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5GHz, 802.11ac, 802.11ax

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5Ghz, 802.11ac
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

Yes

Yes
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C

Type-C 2.0
USB On-The-Go

-

Yes
Bluetooth

v5.2

v5.1
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

-

aptX HD
Infrared

Yes

-
NFC

Yes

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
BDS

Yes

Yes
QZSS

Yes

-
NavIC

Yes

-

Features
Sensors

Accelerometer, barometer, compass, color spectrum, fingerprint, gyroscope, proximity

Accelerometer, color spectrum, compass, fingerprint, gyroscope, proximity

Battery
Battery type

Li-Po

Li-Po
Battery capacity

4500 mAh

4315 mAh
Battery removable

Non-removable

Non-removable
Fast battery charging

Quick Charge 4+, 67W (100% in 40 min)

Vivo FlashCharge (57% in 30 min)
DxOMark autonomy

-

45
DxOMark charging

-

80
DxOMark efficiency

-

68
DxOMark battery score

-

60