Home Phone comparison Samsung Galaxy S21 and Oppo K13 Turbo - Which is better?

Samsung Galaxy S21 vs Oppo K13 Turbo

65 out 100
Samsung Galaxy S21
VS
77 out 100
Oppo K13 Turbo
Samsung Galaxy S21
Oppo K13 Turbo

Compared 2 smartphones : Samsung Galaxy S21 Manufactured in February, 2021, with display 6.2 with chipsetSamsung Exynos 2100, vs Oppo K13 Turbo, Manufactured in July, 2025 with chipsetMediaTek Dimensity 8450. 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 S21
  • Lighter design: 169g vs 207g
  • Supports newer USB: 3.2 vs 2
  • Supports Dolby Atmos
  • Built-in eSIM
Reasons to choose Oppo K13 Turbo
  • Larger display: 6.8in
  • Higher pixel density: 453ppi
  • Higher battery capacity: 7000mAh vs 4000mAh
  • Newer Bluetooth version: 5.4 vs 5
  • Infrared port
  • Includes charger

Versions

Available versions and configurations
Memory Options - 8/128 GB
- 8/256 GB		 - 8/128 GB
- 8/256 GB
- 12/256 GB
- 12/512 GB
- 16/256 GB

Review

Key Specs Samsung Galaxy S21 and Oppo K13 Turbo
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.
Customize your score
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 S21
vs
Oppo K13 Turbo

Display

Display quality comparison
Type Dynamic AMOLED AMOLED
Size 6.2 in 6.8 in
Resolution 1080x2400 pixels 1280x2800 pixels
Aspect ratio 20:9 19.5:9
Pixel density 421 ppi 453 ppi
Refresh rate 120 Hz 120 Hz
Adaptive refresh rate Yes (48-120 Hz) Yes (60-120 Hz)
Max brightness 800 nits 1600 nits
HDR support Yes HDR10+ No
Touch Sampling Rate n/a 240 Hz
Screen-to-body ratio 85.9 % 90.3 %
Features - DCI-P3
- Always-On Display		 - DCI-P3
- Always-On Display
- DC dimming
Display test
Peak brightness (auto)
Samsung Galaxy S21
854 nits
Oppo K13 Turbo
n/a
sRGB gamut99.5 %n/a
PWM (Flicker)240 Hzn/a
Response time5 msn/a
Contrast∞ Infiniten/a
Sources: NotebookCheck [Samsung Galaxy S21]

Design & Build

Design and ergonomics comparison
Height 151.7 mm (5.97 in) 162.8 mm (6.41 in)
Width 71.2 mm (2.8 in) 77.2 mm (3.04 in)
Thickness 7.9 mm (0.31 in) 8.3 mm (0.33 in)
Weight 169 g (5.96 oz) 207 g (7.3 oz)
Water resistance IP68 IPX9
Cooling system n/a Active fan
Back panel Plastic n/a
Frame Metal Plastic
Colors - White
- Gray
- Pink
- Purple		 - White
- Black
- Purple
Fingerprint sensor Yes In-Display Yes, In-Display
Screen-to-body ratio
Samsung Galaxy S21
85.9 %
Oppo K13 Turbo
90.3 %

Performance

Testing Samsung Galaxy S21 and Oppo K13 Turbo In benchmarks
Processor
Chipset Samsung Exynos 2100 MediaTek Dimensity 8450
Max Frequency 2900 MHz 3250 MHz
CPU Cores 8 (1 + 3 + 4) 8 (1 + 3 + 4)
Architecture - 4/2.2 (Cortex-A55)
- 3/2.81 (Cortex-A78)
- 1/2.91 (Cortex-X1)		 - 4/2.1 (Cortex-A725)
- 3/3 (Cortex-A725)
- 1/3.25 (Cortex-A725)
Process Samsung TSMC
Transistor Size 5 nm 4 nm
Neural Processor Yes MediaTek NPU 880
Graphics Mali-G78 MP14 Mali-G720 MP7
GPU Cores 896 896
GPU Frequency 854 MHz 1300 MHz
FLOPS 1530.4 GFLOPS 2329.6 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy S21
1331
Oppo K13 Turbo
1456
Geekbench 6 (Multi-Core)
Samsung Galaxy S21
3593
Oppo K13 Turbo
5932
Geekbench 6 (Single-Core)13311456
Geekbench 6 (Multi-Core)35935932
Geekbench Compute (GPU)n/a12321
Sources: Geekbench v6 [Oppo K13 Turbo]
AnTuTu 10
AnTuTu 10
Samsung Galaxy S21
903780
Oppo K13 Turbo
1588013
CPU253391379822
GPU281676639487
Memory158352276798
UX210361291906
NanoReview Score9037801588013
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy S21
5715
Oppo K13 Turbo
n/a
Max Surface Temp.38.9 °Cn/a
Stability66 %n/a
Graphics Test34 fpsn/a
Graphics Score5715n/a
Sources: 3DMark [Samsung Galaxy S21]
PCMark 3.0
PCMark 3.0
Samsung Galaxy S21
13123
Oppo K13 Turbo
n/a
Writing score16101n/a
Web score11909n/a
Video editing7097n/a
Data manipulation10153n/a
NanoReview Score13123n/a

Memory

RAM
RAM Size 8 GB 8 GB
Memory Type LPDDR5 LPDDR5X
Memory Frequency 2750 MHz n/a
Channels 2 4
Storage
Storage Capacity- 128 GB
- 256 GB		128 GB
Storage TypeUFS 3.1UFS 3.1
Memory CardNoNo

Software

OS Android 11 (Upgradeable to Android 14) Android 15
OS Size 28.1 GB n/a
UI Skin One UI 6.0 ColorOS 15

Battery

Volume 4000 mAh 7000 mAh
Max Charging Power 25 W 80 W
Battery Type Li-ion Silicon Carbon (Si/C)
Removable No No
Wireless Charging Yes (15 W) No
Reverse Charging Yes (Wireless) Yes
Fast Charging Yes (55% in 50 min) Yes (63% in 30 min)
Full Charge Time 1:35 h 0:56 h
Battery Life Test
Battery Life
Samsung Galaxy S21
17:54
Oppo K13 Turbo
n/a
Web Browsing06:01 hn/a
Video Playback11:06 hn/a
Games04:21 hn/a
Standby Mode95 hn/a

Main camera

Matrix 12 MP 50 MP
Photo resolution 4000x3000 pixels 8192x6144 pixels
Zoom Optical, 1.1x Digital
Flash Dual LED LED
Stabilization Optical Digital
8K Recording Up to 24FPS No
4K Recording Yes (Up to 60 fps) Yes (Up to 30 fps)
1080p Recording Yes (Up to 60 fps) Yes (Up to 60 fps)
Slow Motion 960 fps (720p) 120 fps (1080p)
Wide-angle lens 120 ° n/a
Lenses count Standard: 12 MP
Telephoto: 64 MP
Ultra-wide: 12 MP		 Standard: 50 MP
Depth: 2 MP
Features - Bokeh effect
- Pro mode
- RAW support		 - Bokeh effect
- Pro mode
Main lens
Matrix12 MP50 MP
Aperturef/1.8f/1.8
Focal length26 mm27 mm
SensorSony IMX555n/a
Sensor size1/1.76n/a
Pixel size1.8 μmn/a
AutofocusPhase autofocus (Dual Pixel)Phase autofocus
StabilizationOpticalDigital
Telephoto
Matrix64 MPn/a
Aperturef/2.0n/a
Focal length28 mmn/a
SensorSamsung Bright S5KGW2n/a
Sensor size1/1.72n/a
Pixel size0.8 μmn/a
StabilizationOpticaln/a
Ultra-wide lens
Matrix12 MPn/a
Aperturef/2.2n/a
Focal length13 mmn/a
SensorSony IMX563n/a
Sensor size1/2.55n/a
Pixel size1.4 μmn/a
StabilizationDigitaln/a
Main camera DxOMark results
Photo quality
Samsung Galaxy S21
129
Oppo K13 Turbo
n/a
Video quality
Samsung Galaxy S21
137
Oppo K13 Turbo
n/a
Overall camera score
Samsung Galaxy S21
133
Oppo K13 Turbo
n/a
Bokeh70n/a
Preview72n/a
Zoom126n/a
Sources: DxOMark [Samsung Galaxy S21]

Front camera

Matrix 10 MP 16 MP
Photo resolution 3872x2592 pixels 4920x3264 pixels
Aperture f/2.2 f/2.4
Focal length 26 mm 22 mm
Sensor Sony IMX374 CMOS
Sensor size 1/3.24 n/a
Pixel size 1.22 μm n/a
Autofocus Phase autofocus (Dual Pixel) No
Stabilization Digital Digital
Video resolution 2160p (4K) at 60 fps 1080p (Full HD) at 30 fps
TOF 3D sensor No No

Connectivity

Wi-Fi version Wi-Fi 6 (802.11 a/b/g/n/ac/ax) Wi-Fi 6 (802.11 a/b/g/n/ac/ax)
Wi-Fi features - Dual Band
- Wi-Fi MiMO
- 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 LE, A2DP LE
USB type USB Type-C USB Type-C
USB version 3.2 2
USB features - Charging
- USB Storage Mode
- USB-Host mode
- OTG		 - Charging
- USB Storage Mode
- OTG
DisplayPort n/a No
GPS - GPS
- GLONASS
- Beidou
- Galileo		 - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
NFC* Yes Yes
Infrared Port No Yes
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *YesNo
Hybrid SlotNoNo
2G BandsGSM 850, 900, 1800, 1900 MHzGSM 900/1800MHz
3G BandsWCDMA Band 1, 2, 4, 5, 8WCDMA 1/5/6/8/19
LTE Bands*LTE (B1/B2/B3/B4/B5/B7/B8/B12/B13/B17/B18/B19/B20/B25/B26/B28/B32/B38/B39/B40/B41/B66)LTE (B1/B3/B5/B8/B19/B38/B40/B41/B42/B48)
LTE category24n/a
5G SupportYesYes

Sound

Speakers Stereo n/a
3.5 mm Jack No No
FM Radio No No
Dolby Atmos Yes n/a
Speaker Test
Max Volume
Samsung Galaxy S21
87 dB
Oppo K13 Turbo
n/a

Other

Class Flagship Mid-range
Announced January, 2021 yr July, 2025 yr
Release Date February, 2021 yr July, 2025 yr
Launch Price ($) 800 n/a
MSRP ($) n/a 305
Sensors - Hall Sensor
- Barometer
- 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, 80 W
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

After analyzing the data, we consider Oppo K13 Turbo the clear winner in this comparison.

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