Screen size
Poco C81xWinner: 6.9"+78%
Watch S51.5"
Quick verdict
Poco C81x leads the measured specs 15-4.
Measured wins
Poco C81x
15
spec wins
Overall winner
Ties
2
equal specs
Watch S5
4
spec wins
Screen size
Technology
Poco C81x
GSM / HSPA / LTE
Watch S5
HSPA / LTE
2G bands
Poco C81x
GSM 850 / 900 / 1800 / 1900
Watch S5
3G bands
Poco C81x
HSDPA 850 / 900 / 2100
Watch S5
HSDPA
4G bands
Poco C81x
1, 3, 5, 8, 28, 40, 41
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
equal specsUSB
5G support
equal specsNFC
3.5mm jack
SD card
Stereo speakers
Watch S5
LTE
Speed
Poco C81x
HSPA, LTE
Watch S5
HSPA, LTE
GPRS
Poco C81x
-
Watch S5
No
EDGE
Poco C81x
-
Watch S5
No
Announced
Poco C81x
2026, April 23
Watch S5
2026, May 28
Status
Poco C81x
Available. Released 2026, April 23
Watch S5
Available. Released 2026, May 28
Dimensions
Poco C81x
171.8 x 77.8 x 8.3 mm (6.76 x 3.06 x 0.33 in)
Watch S5
46 x 46 x 11 mm (1.81 x 1.81 x 0.43 in)
Weight
Poco C81x
193 g (6.81 oz)
Watch S5
46 g (1.62 oz)
SIM
Poco C81x
Nano-SIM + Nano-SIM
Watch S5
eSIM (market/region dependent)
Other
Poco C81x
Dust and splash resistant
Watch S5
Waterproof (5ATM)
Build
Poco C81x
-
Watch S5
Glass front, stainless steel frame, stainless steel/ceramic/forged carbon bezel
Type
Poco C81x
IPS LCD, 120Hz, 650 nits (HBM)
Watch S5
AMOLED, 1500 nits (HBM), 2500 nits (peak)
Size
Poco C81x
6.88 inches, 112.4 cm2 (~84.1% screen-to-body ratio)
Watch S5
1.48 inches
Resolution
Poco C81x
720 x 1640 pixels (~260 ppi density)
Watch S5
480 x 480 pixels (~459 ppi density)
Protection
Poco C81x
-
Watch S5
Drop-proof glass
OS
Poco C81x
Android 15, up to 2 major Android upgrades
Watch S5
Xiaomi HyperOS 3
Chipset
Poco C81x
Unisoc T7250 (12 nm)
Watch S5
-
CPU
Poco C81x
Octa-core (2x1.8 GHz Cortex-A75 & 6x1.6 GHz Cortex-A55)
Watch S5
-
GPU
Poco C81x
Mali-G57 MP1
Watch S5
-
Card slot
Poco C81x
microSDXC (dedicated slot)
Watch S5
No
Internal
Poco C81x
64GB 3GB RAM
Watch S5
-
Single
Poco C81x
13 MP, f/2.2, (wide)
Watch S5
-
Features
Poco C81x
LED flash, HDR
Watch S5
-
Video
Poco C81x
1080p@30fps
Watch S5
-
Single
Poco C81x
8 MP, f/2.0, (wide)
Watch S5
-
Features
Poco C81x
HDR
Watch S5
-
Video
Poco C81x
1080p@30fps
Watch S5
-
Loudspeaker
Poco C81x
Yes
Watch S5
Yes
3.5mm jack
Poco C81x
Yes
Watch S5
No
WLAN
Poco C81x
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Watch S5
No
Bluetooth
Poco C81x
5.2, A2DP, LE
Watch S5
5.4, LE
Positioning
Poco C81x
GPS, GALILEO, GLONASS, QZSS
Watch S5
GPS (L1+L5), GLONASS, GALILEO, BDS, QZSS
NFC
Poco C81x
No
Watch S5
Yes (market/region dependent)
Radio
Poco C81x
FM radio
Watch S5
No
USB
Poco C81x
USB Type-C 2.0, OTG
Watch S5
No
Sensors
Poco C81x
Fingerprint (side-mounted), accelerometer, compass
Watch S5
Accelerometer, gyro, compass, barometer, heart rate, SpO2
Other
Poco C81x
Virtual proximity sensing
Watch S5
-
Type
Poco C81x
5200 mAh
Watch S5
Li-Po 815 mAh
Charging
Poco C81x
15W wired 7.5W reverse wired
Watch S5
-
Colors
Poco C81x
Ice Blue, Crystal Black
Watch S5
Black, Silver, Ceramic Blue, Jungle Green, Beige (eSIM)
Price
Poco C81x
About 90 EUR
Watch S5
About 180 EUR
Models
Poco C81x
-
Watch S5
M2530W1, M2517W1
Other
Poco C81x
-
Watch S5
No