Samsung Galaxy A8 Star (A9 Star)
#2314
Xiaomi Redmi K20
#1502Category Breakdown
Samsung Galaxy A8 Star (A9 Star)
Xiaomi Redmi K20
Performance
74.377.4
Camera
38.167.3
Display
82.883.7
Battery
27.028.1
Build
80.595.7
Connectivity
69.664.3
Audio
8.98.9
Overall
50.157.7
Summary
- The Samsung Galaxy A8 Star features a 6.3-inch Super AMOLED display with a resolution of 1080 x 2220 pixels, while the Xiaomi Redmi K20 has a slightly smaller 6.39-inch Super AMOLED display with HDR support and a resolution of 1080 x 2340 pixels.
- In terms of performance, the A8 Star is powered by the Snapdragon 660 chipset, whereas the K20 utilizes the more advanced Snapdragon 730, offering better efficiency and graphics performance.
- The camera setup on the K20 is superior, with a 48 MP main sensor compared to the A8 Star's 24 MP, and it also supports more advanced video recording options.
- Both devices have a similar battery capacity, with the K20 at 4000 mAh and the A8 Star at 3700 mAh, but the K20 supports slightly faster charging at 18W.
- Both phones have a premium build quality with glass fronts and backs, and they run on different software experiences, with the A8 Star on Android 8.0 upgradable to 9.0, while the K20 starts at Android 9.0 and is upgradable to 10.
Side-by-side Specification Comparison
Samsung Galaxy A8 Star (A9 Star)
Xiaomi Redmi K20
General
Release Date
2018
2019
Announced
2018
2019
Description
Versions: A8 Star (Global, SEA, South Korea); A9 Star (China)
N/A
Display
Size
6.3"
6.39"
Type
Super AMOLED
Super AMOLED, HDR
Resolution
1080 x 2220 pixels, 18.5:9 ratio (~392 ppi density)
1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density)
PPI
1080
1080
Refresh Rate
60Hz
60Hz
HDR Support
✗
✓
Protection
Corning Gorilla Glass 5
Corning Gorilla Glass 5
Performance
Chipset
Qualcomm SDM660 Snapdragon 660 (14 nm)
Qualcomm SDM730 Snapdragon 730 (8 nm)
CPU
Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)
Octa-core (2x2.2 GHz Kryo 470 Gold & 6x1.8 GHz Kryo 470 Silver)
GPU
Adreno 512
Adreno 618
Memory
64GB 4GB RAM, 64GB 6GB RAM
64GB 6GB RAM, 128GB 6GB RAM, 256GB 8GB RAM
Expandable Storage
✗
✗
Card Slot
microSDXC (uses shared SIM slot)
No
Camera
Main Camera
24 MP, f/1.7, 27mm (wide), 1/2.8", 0.9µm, PDAF16 MP, f/1.7, PDAF
48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF8 MP, f/2.4, 53mm (telephoto), 1/4.0", 1.12µm, PDAF, 2x optical zoom13 MP, f/2.4, 12mm (ultrawide), 1/3.1", 1.12µm
Main Camera Features
LED flash, panorama, HDR
Dual-LED flash, HDR, panorama
Front Camera
24 MP, f/2.0, 26mm (wide), 1/2.8", 0.9µm
Motorized pop-up 20 MP, f/2.2, (wide), 1/3.4", 0.8µm
Front Camera Features
N/A
HDR
Video Recording
4K@30fps, 1080p@30fps
4K@30fps, 1080p@30/120/240fps, 1080p@960fps
Selfie Video
1080p@30fps
1080p@30fps
Optical Stabilization
✗
✗
Night Mode
✗
✗
Raw Photo Support
✗
✗
Battery
Capacity
3700 mAh
4000 mAh
Battery Details
Li-Ion 3700 mAh, non-removable
Li-Po 4000 mAh, non-removable
Charging Details
15W wired
18W wired
Fast Charging
✗
✗
Wireless Charging
✗
✗
Build & Safety
Dimensions
162.4 x 77 x 7.6 mm (6.39 x 3.03 x 0.30 in)
156.7 x 74.3 x 8.8 mm (6.17 x 2.93 x 0.35 in)
Weight
191 g
191 g
Materials
Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), aluminum frame
Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), aluminum frame
Colors
Black, White
Carbon black, Red flame, Glacier blue, Pearl White
Foldable
✗
✗
SAR
N/A
1.07 W/kg (head) 0.72 W/kg (body)
Connectivity
SIM
Nano-SIM + Nano-SIM
Nano-SIM + Nano-SIM
Network
GSM / CDMA / HSPA / LTE
GSM / HSPA / LTE
Network Speed
HSPA 42.2/5.76 Mbps, LTE (3CA) Cat9 450/50 Mbps
HSPA, LTE
5G
✗
✗
4G
✓
✓
WiFi
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Bluetooth
5.0, A2DP, LE
5.0, A2DP, LE, aptX HD
NFC
✓
✓
USB
USB Type-C 2.0
USB Type-C 2.0, OTG
IR Blaster
✗
✗
Headphone Jack
✓
✓
Radio
✗
✗
Positioning
GPS, GLONASS, BDS, GALILEO
GPS, GLONASS, GALILEO, BDS
Audio
Stereo Speakers
✗
✗
Loudspeaker
Yes
Yes
Audio Jack
Yes
Yes
Software & Security
Operating System
Android 8.0 (Oreo), upgradable to Android 9.0 (Pie), One UI
Android 9.0 (Pie), upgradable to Android 10, MIUI 12
Fingerprint
✓
✓
Face Unlock
✗
✗
Sensors
Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Fingerprint (under display, optical), accelerometer, gyro, proximity, compass