Screen size
C51sWinner: 6.7"+1%
Neo7x6.7"
Quick verdict
Neo7x leads the measured specs 13-4.
Measured wins
C51s
4
spec wins
Ties
4
equal specs
Neo7x
13
spec wins
Overall winner
Screen size
Technology
C51s
GSM / HSPA / LTE
Neo7x
GSM / HSPA / LTE / 5G
2G bands
C51s
GSM 850 / 900 / 1800 / 1900
Neo7x
GSM 850 / 900 / 1800 / 1900
3G bands
C51s
HSDPA 900 / 2100
Neo7x
HSDPA 850 / 900 / 2100
4G bands
C51s
1, 3, 5, 8, 38, 40
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
equal specsMain camera
equal specsFront camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
NFC
equal specs3.5mm jack
equal specsSD card
Stereo speakers
Neo7x
1, 3, 5, 8, 28, 34, 38, 39, 40, 41
Speed
C51s
HSPA, LTE
Neo7x
HSPA, LTE, 5G
5G bands
C51s
-
Neo7x
1, 5, 8, 28, 41, 77, 78 SA/NSA
Announced
C51s
2024, March 15
Neo7x
2025, February 25
Status
C51s
Available. Released 2024, March 15
Neo7x
Available. Released 2025, February 25
Dimensions
C51s
167.2 x 76.7 x 7.5 mm (6.58 x 3.02 x 0.30 in)
Neo7x
163.2 x 75.7 x 8 mm (6.43 x 2.98 x 0.31 in)
Weight
C51s
182 g (6.42 oz)
Neo7x
194 g (6.84 oz)
Build
C51s
Glass front, plastic frame, plastic back
Neo7x
-
SIM
C51s
Nano-SIM + Nano-SIM
Neo7x
Nano-SIM + Nano-SIM
Other
C51s
IP54 dust protected and water resistant (water splashes)
Neo7x
IP68/IP69 dust tight and water resistant (high pressure water jets; immersible up to 2.5m for 30 min)
Type
C51s
IPS LCD, 90Hz, 560 nits (peak)
Neo7x
AMOLED, 120Hz, 2000 nits (peak)
Size
C51s
6.74 inches, 109.7 cm2 (~85.5% screen-to-body ratio)
Neo7x
6.67 inches, 107.4 cm2 (~86.9% screen-to-body ratio)
Resolution
C51s
720 x 1600 pixels, 20:9 ratio (~260 ppi density)
Neo7x
1080 x 2400 pixels, 20:9 ratio (~395 ppi density)
Other
C51s
-
Neo7x
HDR image support
OS
C51s
Android 13, Realme UI
Neo7x
Android 15, Realme UI 6.0
Chipset
C51s
Unisoc Tiger T612 (12 nm)
Neo7x
Qualcomm Snapdragon 6 Gen 4 (4 nm)
CPU
C51s
Octa-core (2x1.8 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55)
Neo7x
Octa-core (1x2.3 GHz Cortex-A720s & 3x2.2 GHz Cortex-A720s & 4x1.8 GHz Cortex-A520s)
GPU
C51s
Mali-G57
Neo7x
Adreno 810
Card slot
C51s
microSDXC (dedicated slot)
Neo7x
No
Internal
C51s
128GB 6GB RAM
Neo7x
128GB 8GB RAM, 256GB 8GB RAM, 512GB 12GB RAM
Other
C51s
еMMC 5.1
Neo7x
-
Single
C51s
50 MP, f/1.8, 27mm (wide), 1/2.76", 0.64µm, PDAF Auxiliary lens
Neo7x
50 MP, f/1.8, 27mm (wide), 1/2.88", 0.61µm, PDAF
Features
C51s
LED flash, HDR, panorama
Neo7x
LED flash, HDR, panorama
Video
C51s
1080p@30fps
Neo7x
4K@30fps, 1080p@30/60/120fps, gyro-EIS
Single
C51s
5 MP, f/2.2, 28mm (wide), 1/5.0", 1.12µm
Neo7x
16 MP, f/2.4, 23mm (wide), 1/3.09", 1.0µm
Features
C51s
HDR
Neo7x
-
Video
C51s
720p@30fps
Neo7x
1080p@30fps
Loudspeaker
C51s
Yes
Neo7x
Yes, with stereo speakers
3.5mm jack
C51s
Yes
Neo7x
Yes
Other
C51s
-
Neo7x
24-bit/192kHz Hi-Res audio
WLAN
C51s
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Neo7x
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Bluetooth
C51s
5.0, A2DP, LE
Neo7x
5.2, A2DP, LE
Positioning
C51s
GPS, GLONASS, GALILEO
Neo7x
GPS, GLONASS, GALILEO, BDS, QZSS
NFC
C51s
Yes, 360˚ (market/region dependent)
Neo7x
Yes
Radio
C51s
Unspecified
Neo7x
No
USB
C51s
USB Type-C
Neo7x
USB Type-C
Infrared port
C51s
-
Neo7x
Yes
Sensors
C51s
Fingerprint (side-mounted), accelerometer, gyro, proximity, compass
Neo7x
Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
Type
C51s
5000 mAh
Neo7x
Si/C Li-Ion 6000 mAh
Charging
C51s
33W wired, 0-50% in 28 min
Neo7x
45W wired, 50% in 30 min
Colors
C51s
Shiny Green, Mighty Black
Neo7x
Gray, White
Models
C51s
RMX3765
Neo7x
-
Price
C51s
About 100 EUR
Neo7x
About 170 EUR