Home Phone comparison Samsung Galaxy A51 and Vivo iQOO Z11x - Which is better?

Samsung Galaxy A51 vs Vivo iQOO Z11x

41 out 100
Samsung Galaxy A51
VS
67 out 100
Vivo iQOO Z11x
Samsung Galaxy A51
Vivo iQOO Z11x

Compared 2 smartphones : Samsung Galaxy A51 Manufactured in December, 2019, with display 6.5 with chipsetSamsung Exynos 9 Octa 9611, vs Vivo iQOO Z11x, Manufactured in March, 2026 with chipsetMediatek Dimensity 7400. Below are specs, tests, pros and cons for each device

  1. Differences
  2. Review
  3. Specs
  4. Benchmarks
  5. Battery Life
  6. Cameras
  7. Comments (0)

Key Differences

Device key advantages
Reasons to choose Samsung Galaxy A51
  • Higher pixel density: 405ppi
  • Lighter design: 172g vs 219g
  • Supports Dolby Atmos
Reasons to choose Vivo iQOO Z11x
  • Larger display: 6.76in
  • Higher refresh rate: 120Hz
  • Higher battery capacity: 7200mAh vs 4000mAh
  • Newer Bluetooth version: 5.4 vs 5
  • Includes charger

Versions

Available versions and configurations
Memory Options - 4/64 GB
- 4/128 GB
- 6/128 GB
- 8/128 GB
- 8/256 GB		 - 6/128 GB
- 8/128 GB
- 8/256 GB

Review

Key Specs Samsung Galaxy A51 and Vivo iQOO Z11x
Display
Color accuracy, sharpness & brightness
Camera
Main & front camera tests
Performance
App & system performance
Games
3D gaming performance
Battery
Battery life, charging speed & type
Connectivity
Connectivity features
NanoReview Score
Overall score by NanoReview
Adjust each parameter’s importance to find the best match for you.
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Function
Importance (Weight)
Display:
Camera:
Performance:
Gaming:
Battery:
Connectivity:
Higher weight means greater impact on NanoReview score.

Tests & specs

Specs & test comparison
Smartphones:
Samsung Galaxy A51
vs
Vivo iQOO Z11x

Display

Display quality comparison
Type Super AMOLED IPS LCD
Size 6.5 in 6.76 in
Resolution 1080x2400 pixels 1080x2344 pixels
Aspect ratio 20:9 19.5:9
Pixel density 405 ppi 382 ppi
Refresh rate 60 Hz 120 Hz
Adaptive refresh rate No Yes (60-120 Hz)
Max brightness 400 nits 1200 nits
HDR support No No
Screen-to-body ratio 87.5 % 85.9 %
Features Always-On Display n/a
Display test
Peak brightness (auto)
Samsung Galaxy A51
631 nits
Vivo iQOO Z11x
n/a
sRGB gamut98.8 %n/a
PWM (Flicker)242 Hzn/a
Response time25 msn/a
Contrast∞ Infiniten/a
Sources: NotebookCheck [Samsung Galaxy A51]

Design & Build

Design and ergonomics comparison
Height 158.5 mm (6.24 in) 166.6 mm (6.56 in)
Width 73.6 mm (2.9 in) 78.4 mm (3.09 in)
Thickness 7.9 mm (0.31 in) 8.4 mm (0.33 in)
Weight 172 g (6.07 oz) 219 g (7.72 oz)
Water resistance No IP69
Back panel Plastic Plastic
Frame Plastic Plastic
Colors - White
- Black		 - Black
- Green
Fingerprint sensor Yes In-Display Yes, In-Button
Screen-to-body ratio
Samsung Galaxy A51
87.5 %
Vivo iQOO Z11x
85.9 %

Performance

Testing Samsung Galaxy A51 and Vivo iQOO Z11x In benchmarks
Processor
Chipset Samsung Exynos 9 Octa 9611 Mediatek Dimensity 7400
Max Frequency 2300 MHz 2600 MHz
CPU Cores 8 (4 + 4) 8 (4 + 4)
Architecture - 4/1.7 (Cortex-A53)
- 4/2.3 (Cortex-A73)		 - 4/2 (Cortex-A55)
- 4/2.6 (Cortex-A78)
Process Samsung TSMC
Transistor Size 10 nm 4 nm
Neural Processor Yes MediaTek APU 655
Graphics Mali-G72 MP3 Mali-G615 MP2
GPU Cores 54 256
GPU Frequency 850 MHz 1300 MHz
FLOPS 113.8 GFLOPS 665.6 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy A51
512
Vivo iQOO Z11x
1064
Geekbench 6 (Multi-Core)
Samsung Galaxy A51
1556
Vivo iQOO Z11x
2878
Geekbench 6 (Single-Core)5121064
Geekbench 6 (Multi-Core)15562878
Geekbench Compute (GPU)n/a3062
Sources: Geekbench v6 [Vivo iQOO Z11x]
AnTuTu 10
AnTuTu 10
Samsung Galaxy A51
268760
Vivo iQOO Z11x
922227
CPU83857329972
GPU45166147724
Memory63828155228
UX75909289303
NanoReview Score268760922227
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy A51
812
Vivo iQOO Z11x
n/a
Max Surface Temp.42.2 °Cn/a
Stability95 %n/a
Graphics Test4 fpsn/a
Graphics Score812n/a
Sources: 3DMark [Samsung Galaxy A51]

Memory

RAM
RAM Size - 4 GB
- 6 GB		 6 GB
Memory Type LPDDR4X LPDDR4X
Memory Frequency 1866 MHz 2133 MHz
Channels 2 2
Storage
Storage Capacity- 64 GB
- 128 GB		128 GB
Storage TypeUFS 2.0UFS 3.1
Memory CardMicroSDNo

Software

OS Android 10 (Upgradeable to Android 13) Android 16
OS Size 23 GB n/a
UI Skin One UI 5.1 OriginOS 6

Battery

Volume 4000 mAh 7200 mAh
Max Charging Power 15 W 44 W
Battery Type Li-Po Silicon Carbon (Si/C)
Removable No No
Wireless Charging No No
Reverse Charging No Yes
Fast Charging Yes (40% in 35 min) Yes (50% in 43 min)
Full Charge Time 1:50 h n/a
Battery Life Test
Battery Life
Samsung Galaxy A51
17:53
Vivo iQOO Z11x
n/a
Web Browsing07:15 hn/a
Video Playback11:25 hn/a
Games04:49 hn/a
Standby Mode81 hn/a

Main camera

Matrix 48 MP 50 MP
Photo resolution 8000x6000 pixels 8192x6144 pixels
Zoom Digital Digital
Flash LED LED
Stabilization Digital Digital
8K Recording No No
4K Recording Yes (Up to 30 fps) Yes (Up to 30 fps)
1080p Recording Yes (Up to 30 fps) Yes (Up to 30 fps)
Slow Motion 960 fps (720p) n/a
Wide-angle lens 120 ° n/a
Lenses count Standard: 48 MP
Ultra-wide: 12 MP
Macro: 5 MP
Depth: 5 MP		 Standard: 50 MP
Depth
Features - Bokeh effect
- Pro mode		 - Bokeh effect
- Pro mode
Main lens
Matrix48 MP50 MP
Aperturef/2.0n/a
Focal length26 mmn/a
SensorSony IMX582n/a
Sensor size1/21/2.93 (0.34)
Pixel size0.8 μmn/a
AutofocusPhase autofocusPhase autofocus
StabilizationDigitalDigital
Ultra-wide lens
Matrix12 MPn/a
Aperturef/2.2n/a
Focal length13 mmn/a
Pixel size1.12 μmn/a
StabilizationDigitaln/a

Front camera

Matrix 32 MP 32 MP
Photo resolution 6560x4928 pixels n/a
Aperture f/2.2 n/a
Focal length 26 mm n/a
Sensor Samsung S5KGD1 n/a
Sensor size 1/2.8 n/a
Pixel size 0.8 μm n/a
Autofocus No No
Stabilization Digital Digital
Video resolution 2160p (4K) at 30 fps 1080p (Full HD) at 30 fps
TOF 3D sensor No No

Connectivity

Wi-Fi version Wi-Fi 5 (802.11 a/b/g/n/ac) Wi-Fi 5 (802.11 a/b/g/n/ac)
Wi-Fi features - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display		 - Dual Band
- Wi-Fi MiMO
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5 5.4
Bluetooth features PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP LE
USB type USB Type-C USB Type-C
USB version 2 2
USB features - Charging
- USB Storage Mode
- OTG		 - Charging
- USB Storage Mode
- OTG
DisplayPort n/a No
GPS - GPS
- GLONASS
- Beidou
- Galileo		 - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
NFC* Yes No
Infrared Port No No
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *NoNo
Hybrid SlotNoNo
2G BandsGSM 850 / 900 / 1800 / 2100 / 2600n/a
3G BandsUMTS 850 / 900 / 1900 / 2100n/a
LTE Bands*LTE (B850/B900/B1800/B2100/B2600)n/a
LTE category12n/a
5G SupportNoYes

Sound

Speakers Mono n/a
3.5 mm Jack Yes No
FM Radio Yes No
Dolby Atmos Yes No
Speaker Test
Max Volume
Samsung Galaxy A51
81.7 dB
Vivo iQOO Z11x
n/a

Other

Class Mid-range Mid-range
Announced December, 2019 yr March, 2026 yr
Release Date December, 2019 yr March, 2026 yr
Launch Price ($) 399 n/a
Sensors - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included n/a Yes, 0 W
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

After analyzing the data, we consider Vivo iQOO Z11x the clear winner in this comparison.

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