Xiaomi Redmi Note 9S vs Redmi 9A

Here we compared two smartphones: the 6.67-inch Xiaomi Redmi Note 9S (with Qualcomm Snapdragon 720G) that was released on March 23, 2020, against the Xiaomi Redmi 9A, which is powered by MediaTek Helio G25 and came out 4 months after. On this page, you will find tests, full specs, strengths, and weaknesses of each of the gadgets.

Key differences

An overview of the main advantages of each smartphone
Reasons to consider the Xiaomi Redmi Note 9S
  • 3.5x better performance in AnTuTu Benchmark (330K versus 93K)
  • 47% higher pixel density (395 vs 269 PPI)
  • Modern USB Type-C port
  • Compatible with Wi-Fi 5 wireless networks
  • Supports 18W fast charging
  • Delivers 33% higher maximum brightness (574 against 432 nits)
  • Slow-motion recording at 960FPS
  • Fingerprint scanner
  • Ability to record video in 4K resolution
  • More energy-efficient CPU – Snapdragon 720G
  • Has an ultra-wide angle camera lens
  • More recent OS version: Android 11 versus 10
  • Has a built-in infrared port
Reasons to consider the Xiaomi Redmi 9A
  • Weighs 16 grams less

Review

Display
Screen quality, color accuracy, brightness
Performance
CPU/GPU performance in apps and games
Battery
Battery life, charging type and speed
Camera
Photo and video recording quality
Connectivity
Networks, ports, data transmission
NanoReview score
Final comparison evaluation

Value for money

You can enter your local price of these phones (in USD or any other currency) and click on the "Calculate" button to see which one has a better value for money.
Price

Tests and specifications

Comparison table of technical specifications and tests

Display

Type IPS LCD IPS LCD
Size 6.67 inches 6.53 inches
Resolution 1080 x 2400 pixels 720 x 1600 pixels
Aspect ratio 20:9 20:9
PPI 395 ppi 269 ppi
Refresh rate 60 Hz 60 Hz
HDR support Yes, HDR10 No
Screen protection Corning Gorilla Glass 5 Tempered glass
Screen-to-body ratio 84.5% 81.1%
Display tests
RGB color space 114.9% 92.9%
PWM Not detected -
Response time 34 ms 40 ms
Contrast 1111:1 1318:1
Max. Brightness
574 nits
432 nits
Sources: NotebookCheck [1], [2]

Design and build

Height 166 mm (6.54 inches) 164.9 mm (6.49 inches)
Width 77 mm (3.03 inches) 77 mm (3.03 inches)
Thickness 8.8 mm (0.35 inches) 9 mm (0.35 inches)
Weight 210 gramm (7.41 oz) 194 gramm (6.84 oz)
Waterproof No No
Rear material Glass Plastic
Frame material Plastic Plastic
Colors White, Black, Blue Gray, Blue, Green
Fingerprint scanner Yes, in home button No
Screen-to-body ratio
84.5%
81.1%

Performance

Tests of Xiaomi Redmi Note 9S and Xiaomi Redmi 9A in the benchmarks
SoC
Chipset Qualcomm Snapdragon 720G MediaTek Helio G25
Max. clock 2300 MHz 2000 MHz
CPU cores 8 (2 + 6) 8 (8)
Architecture - 6 cores at 1.8 GHz: Kryo 465 Silver (Cortex-A55)
- 2 cores at 2.3 GHz: Kryo 465 Gold (Cortex-A76)
- 8 cores at 2 GHz: Cortex-A53
L3 cache 1 MB -
Lithography process 8 nanometers 12 nanometers
Graphics Adreno 618 IMG PowerVR GE8320
GPU clock 750 MHz 650 MHz
FLOPS ~435 GFLOPS ~41.8 GFLOPS
Memory
RAM size 4, 6 GB 2 GB
Memory type LPDDR4X LPDDR4X
Memory clock 2133 MHz 2133 MHz
Channels 2 2
Storage
Storage size 64, 128 GB 32 GB
Storage type UFS 2.1 eMMC 5.1
Memory card MicroSD MicroSD
Memory card max. size Up to 512 GB Up to 256 GB

Benchmarks

Geekbench 5 (Single-Core)
569
135
Geekbench 5 (Multi-Core)
1750
466
AnTuTu Benchmark 9
330100
93412

Software

Operating system Android 10.0 (Can be upgraded to Android 11) Android 10
ROM MIUI 12.5 MIUI 12
OS size 18 GB 11 GB

Battery

Specifications
Capacity 5020 mAh 5000 mAh
Charge power 18 W 10 W
Battery type Li-Po Li-Po
Replaceable No No
Wireless charging No No
Reverse charging No No
Fast charging Yes (50% in 50 min) No
Full charging time 2:30 hr 2:55 hr

Battery life tests

Web browsing (Wi-Fi)
19:12 hr
n/a
Watching videos (Player)
16:30 hr
n/a
Talk (3G)
41:30 hr
n/a

Camera

Specs and camera test of smartphones
Main camera
Matrix 48 megapixels 13 megapixels
Image resolution 8000 x 6000 4128 x 3096
Zoom Digital Digital
Flash LED LED
Stabilization Digital Digital
8K video recording No No
4K video recording Up to 30FPS No
1080p video recording Up to 60FPS Up to 30FPS
Slow motion 960 FPS (1080p) No
Angle of widest lens 119° -
Lenses 4 (48 MP + 8 MP + 5 MP + 2 MP) 1 (13 MP)
Wide (main) lens - 48 MP
- Aperture: f/1.8
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/2", Samsung S5KGM2 (ISOCELL CMOS)
- Phase autofocus
- 13 MP
- Aperture: f/2.2
- Focal length: 28 mm
- Pixel size: 1 micron
- Phase autofocus
Ultra-wide lens - 8 MP
- Aperture: f/2.2
- Focal length: 13 mm
- Pixel size: 1.12 micron
- Sensor: 1/4.0", Omnivision OV8856
-
Macro lens - 5 MP
- Aperture: f/2.4
- Pixel size: 1.12 micron
-
Depth lens - 2 MP
- Aperture: f/2.4
- Pixel size: 1.75 micron
-
Camera features - Bokeh mode
- Pro mode
-
Selfie camera
Megapixels 16 megapixels 5 megapixels
Image resolution 4920 x 3264 2560 x 1960
Aperture f/2.5 f/2.2
Pixel size 1 microns 1.12 microns
Sensor type CMOS CMOS
Sensor size 1/3.06" -
Video resolution 1080p (Full HD) at 30 FPS 1080p (Full HD) at 30 FPS

Connectivity

Wi-Fi standard Wi-Fi 5 (802.11 b/g/n/ac) Wi-Fi 4 (802.11 a/b/g/n)
Wi-Fi features - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5 5
Bluetooth features LE, HID, A2DP LE, HID, A2DP
USB type USB Type-C Micro USB
USB version 2 2
USB features - Charging
- USB-Storage mode
- OTG
- Charging
- USB-Storage mode
- OTG
GPS GPS, GLONASS, Beidou, Galileo, NAVIC GPS, GLONASS, Beidou, Galileo
NFC* No No
Infrared port Yes No
Network
Number of SIM* 2 2
Type of SIM card Nano Nano
Multi SIM mode Standby Standby
eSIM support* No No
Hybrid slot No No
LTE Cat* 12 4
5G support No No

Sound

Speakers Mono Mono
Headphone audio jack Yes Yes
FM radio Yes Yes
Dolby Atmos No No
Speakers test
Max. loudness
81 dB
76.5 dB

Other

Category Mid-range Budget
Announced March 2020 June 2020
Release date April 2020 August 2020
SAR (head) 0.72 W/kg 0.398 W/kg
SAR (body) 0.98 W/kg 0.901 W/kg
Sensors - Proximity sensor
- Gyroscope
- Accelerometer
- Ambient light sensor
- Compass
- Fingerprint
- Proximity sensor
- Accelerometer
- Ambient light sensor
- Compass
*Disclaimer! NFC, GSM network support, and some other specs can be different depending on the country.

Conclusion

After analyzing all the data, we think that the Xiaomi Redmi Note 9S is definitely a better buy.

Cast your vote

So, which phone would you choose?
12 (70.6%)
5 (29.4%)
Total votes: 17

User opinions

You can share your opinion or ask a question in the comments below