Screen size
Poco C81 ProWinner: 6.9"+79%
Watch S4 Sport1.4"
Quick verdict
Poco C81 Pro leads the measured specs 15-4.
Measured wins
Poco C81 Pro
15
spec wins
Overall winner
Ties
2
equal specs
Watch S4 Sport
4
spec wins
Screen size
Technology
Poco C81 Pro
GSM / HSPA / LTE
Watch S4 Sport
GSM / HSPA / LTE
2G bands
Poco C81 Pro
GSM 900 / 1800 / 1900
Watch S4 Sport
GSM 850 / 900 / 1800 / 1900
3G bands
Poco C81 Pro
HSDPA 850 / 900 / 2100 - International, HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - LATAM
Watch S4 Sport
HSDPA
4G bands
Poco C81 Pro
1, 3, 5, 7, 8, 20, 28, 38, 40, 41 - International, 1, 2, 3, 4, 5, 7, 8, 13, 18, 19, 26, 28, 38, 40, 41, 66 - LATAM
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
USB
5G support
equal specsNFC
equal specs3.5mm jack
SD card
Stereo speakers
Watch S4 Sport
LTE
Speed
Poco C81 Pro
HSPA, LTE
Watch S4 Sport
HSPA, LTE
GPRS
Poco C81 Pro
-
Watch S4 Sport
No
EDGE
Poco C81 Pro
-
Watch S4 Sport
No
Announced
Poco C81 Pro
2026, April 27
Watch S4 Sport
2024, July 19
Status
Poco C81 Pro
Available. Released 2026, April 27
Watch S4 Sport
Available. Released 2024, July 19
Dimensions
Poco C81 Pro
171.6 x 79.5 x 8.2 mm (6.76 x 3.13 x 0.32 in)
Watch S4 Sport
46.9 x 46.9 x 12.6 mm (1.85 x 1.85 x 0.50 in)
Weight
Poco C81 Pro
208 g (7.34 oz)
Watch S4 Sport
49 g (1.73 oz)
Build
Poco C81 Pro
Glass front, plastic frame, plastic back
Watch S4 Sport
Sapphire crystal front, titanium alloy case, sapphire crystal back
SIM
Poco C81 Pro
Nano-SIM + Nano-SIM
Watch S4 Sport
eSIM
Other
Poco C81 Pro
-
Watch S4 Sport
Waterproof (5ATM) 40m swimproof/diving (EN13319)
Type
Poco C81 Pro
IPS LCD, 120Hz, 650 nits (typ), 800 nits (peak)
Watch S4 Sport
AMOLED, 2200 nits (peak)
Size
Poco C81 Pro
6.9 inches, 114.9 cm2 (~84.3% screen-to-body ratio)
Watch S4 Sport
1.43 inches
Resolution
Poco C81 Pro
720 x 1600 pixels, 20:9 ratio (~254 ppi density)
Watch S4 Sport
466 x 466 pixels (~326 ppi density)
Protection
Poco C81 Pro
-
Watch S4 Sport
Sapphire crystal glass
OS
Poco C81 Pro
Android 15, up to 4 major Android upgrades, HyperOS 3
Watch S4 Sport
HyperOS
Chipset
Poco C81 Pro
Unisoc T7250 (12 nm)
Watch S4 Sport
-
CPU
Poco C81 Pro
Octa-core (2x1.8 GHz Cortex-A75 & 6x1.6 GHz Cortex-A55)
Watch S4 Sport
-
GPU
Poco C81 Pro
Mali-G57 MP1
Watch S4 Sport
-
Card slot
Poco C81 Pro
microSDXC (dedicated slot)
Watch S4 Sport
No
Internal
Poco C81 Pro
64GB 4GB RAM, 128GB 4GB RAM, 256GB 4GB RAM
Watch S4 Sport
32GB
Other
Poco C81 Pro
UFS 2.2
Watch S4 Sport
-
Single
Poco C81 Pro
13 MP, f/2.2, (wide), 1/3.06"
Watch S4 Sport
-
Features
Poco C81 Pro
LED flash, HDR
Watch S4 Sport
-
Video
Poco C81 Pro
1080p@30fps
Watch S4 Sport
-
Single
Poco C81 Pro
8 MP, f/2.0, (wide)
Watch S4 Sport
-
Features
Poco C81 Pro
HDR
Watch S4 Sport
-
Video
Poco C81 Pro
1080p@30fps
Watch S4 Sport
-
Loudspeaker
Poco C81 Pro
Yes
Watch S4 Sport
Yes
3.5mm jack
Poco C81 Pro
Yes
Watch S4 Sport
No
WLAN
Poco C81 Pro
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Watch S4 Sport
No
Bluetooth
Poco C81 Pro
5.2, A2DP, LE
Watch S4 Sport
5.2, A2DP, LE
Positioning
Poco C81 Pro
GPS, GALILEO, GLONASS, BDS
Watch S4 Sport
GPS (L1+L5), GLONASS, GALILEO, BDS, QZSS
NFC
Poco C81 Pro
Yes (market/region dependent)
Watch S4 Sport
Yes (NFC car key support)
Radio
Poco C81 Pro
FM radio
Watch S4 Sport
No
USB
Poco C81 Pro
USB Type-C 2.0
Watch S4 Sport
No
Sensors
Poco C81 Pro
Fingerprint (side-mounted), accelerometer, compass
Watch S4 Sport
Accelerometer, gyro, compass, barometer, heart rate, SpO2
Other
Poco C81 Pro
Virtual proximity sensing
Watch S4 Sport
Depth gauge NFC car key support: Xiaomi SU7 and Lotus cars
Type
Poco C81 Pro
6000 mAh
Watch S4 Sport
Li-Po 586 mAh
Charging
Poco C81 Pro
15W wired 7.5W reverse wired
Watch S4 Sport
-
Colors
Poco C81 Pro
Black, Gold, Green
Watch S4 Sport
Titanium
Price
Poco C81 Pro
About 120 EUR
Watch S4 Sport
About 250 EUR
Models
Poco C81 Pro
-
Watch S4 Sport
M2312W1
Other
Poco C81 Pro
-
Watch S4 Sport
No