Screen size
S516.0"
Tab A9 ProWinner: 10.1"+41%
Quick verdict
S51 leads the measured specs 7-6.
Measured wins
S51
7
spec wins
Overall winner
Ties
7
equal specs
Tab A9 Pro
6
spec wins
Screen size
Technology
S51
GSM / CDMA / HSPA / LTE
Tab A9 Pro
No cellular connectivity
2G bands
S51
GSM 850 / 900 / 1800 / 1900 , CDMA 800 / 1900
Tab A9 Pro
N/A
3G bands
S51
HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
Tab A9 Pro
N/A
4G bands
S51
1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 34, 38, 39, 40, 41, 66
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
equal specsRAM
equal specsStorage
Main camera
Front camera
Battery
Wired charging
equal specsWeight
Thickness
IP rating
Wi‑Fi
Bluetooth
equal specsUSB
5G support
equal specsNFC
3.5mm jack
equal specsSD card
equal specsStereo speakers
Tab A9 Pro
N/A
Speed
S51
HSPA, LTE
Tab A9 Pro
-
GPRS
S51
-
Tab A9 Pro
No
EDGE
S51
-
Tab A9 Pro
No
Announced
S51
2022, September
Tab A9 Pro
2025, May
Status
S51
Available. Released 2022, September
Tab A9 Pro
Available. Released 2025, May
Dimensions
S51
167.4 x 81.4 x 14.6 mm (6.59 x 3.20 x 0.57 in)
Tab A9 Pro
242.5 x 160.9 x 9.7 mm (9.55 x 6.33 x 0.38 in)
Weight
S51
-
Tab A9 Pro
512 g (1.13 lb)
SIM
S51
Nano-SIM + Nano-SIM
Tab A9 Pro
No
Other
S51
IP68/IP69K dust tight and water resistant (high pressure water jets; immersible up to 1.5m for 30 min) MIL-STD-810G compliant
Tab A9 Pro
-
Type
S51
IPS LCD
Tab A9 Pro
IPS LCD
Size
S51
6.0 inches, 92.9 cm2 (~68.2% screen-to-body ratio)
Tab A9 Pro
10.1 inches, 295.8 cm2 (~75.8% screen-to-body ratio)
Resolution
S51
720 x 1440 pixels, 18:9 ratio (~268 ppi density)
Tab A9 Pro
800 x 1280 pixels, 16:10 ratio (~149 ppi density)
Protection
S51
Corning Gorilla Glass
Tab A9 Pro
Mohs level 5
OS
S51
Android 12
Tab A9 Pro
Android 15
Chipset
S51
Mediatek Helio G25 (12 nm)
Tab A9 Pro
Unisoc T310 (12 nm)
CPU
S51
Octa-core (4x2.0 GHz Cortex-A53 & 4x1.5 GHz Cortex-A53)
Tab A9 Pro
Quad-core (1x2.0 GHz Cortex-A75 & 3x1.8 GHz Cortex-A55)
GPU
S51
PowerVR GE8320
Tab A9 Pro
Mali-G52
Card slot
S51
microSDXC (dedicated slot)
Tab A9 Pro
microSDXC (dedicated slot)
Internal
S51
64GB 4GB RAM
Tab A9 Pro
128GB 4GB RAM
Other
S51
-
Tab A9 Pro
eMMC 5.1
Dual
S51
12 MP, f/1.8, (wide), PDAF Auxiliary lens
Tab A9 Pro
-
Features
S51
Quad-LED flash
Tab A9 Pro
LED flash
Video
S51
1080p
Tab A9 Pro
1080p@30fps
Single
S51
-
Tab A9 Pro
8 MP
Single
S51
8 MP, f/2.0, (wide)
Tab A9 Pro
5 MP
Video
S51
1080p
Tab A9 Pro
Yes
Loudspeaker
S51
Yes
Tab A9 Pro
Yes, with stereo speakers
3.5mm jack
S51
Yes
Tab A9 Pro
Yes
WLAN
S51
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Tab A9 Pro
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Bluetooth
S51
5.0, A2DP, LE
Tab A9 Pro
5.0, A2DP, LE
Positioning
S51
GPS, GLONASS, GALILEO, BDS
Tab A9 Pro
No
NFC
S51
Yes
Tab A9 Pro
No
Radio
S51
FM radio
Tab A9 Pro
No
USB
S51
USB Type-C 2.0, OTG
Tab A9 Pro
USB Type-C
Sensors
S51
Accelerometer, proximity, compass
Tab A9 Pro
Accelerometer
Type
S51
5180 mAh
Tab A9 Pro
6580 mAh
Charging
S51
10W wired
Tab A9 Pro
10W wired
Colors
S51
Black, Green, Orange
Tab A9 Pro
Black, Gray, Blue
Price
S51
-
Tab A9 Pro
About 130 EUR