Vivo X51 5G vs Xiaomi Redmi K100 Pro Max
Product
Price
659 USD
660 USD
Status
Available
Available
Brand
Vivo Mobiles
Xiaomi Mobiles
Model No
vivo X51 5G
Xiaomi Redmi K100 Pro Max
Launch Date
2020, October 23
2026, August 11
Technology
GSM / CDMA / HSPA / LTE / 5G
GSM / HSPA / LTE / 5G
2G bands
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
CDMA 800
GSM 850 / 900 / 1800 / 1900
3G bands
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands
1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 32, 38, 39, 40, 41, 66
1, 3, 4, 5, 7, 8, 18, 19, 26, 28, 34, 38, 39, 40, 41, 42, 43, 48, 66
5G bands
1, 3, 7, 8, 28, 38, 41, 77, 78 SA/NSA
1, 3, 5, 7, 8, 18, 26, 28, 38, 40, 41, 48, 66, 77, 78 SA/NSA
Speed
HSPA 42.2/5.76 Mbps, LTE-A, 5G
HSPA, LTE, 5G
Dimensions
158.5 x 72.8 x 8 mm (6.24 x 2.87 x 0.31 in)
163.5 x 78 x 8.5 mm (6.44 x 3.07 x 0.33 in)
Weight
181.5 g (6.42 oz)
238 g (8.40 oz)
Build
Glass front, glass back, aluminum frame
IP68/IP69 dust tight and water resistant (high pressure water jets; immersible up to 1.5m for 30 min)
SIM
Dual SIM (Nano-SIM, dual stand-by)
Nano-SIM + Nano-SIM
Colors
Gray
Black, White, Blue, Red (Burgundy)
Type
AMOLED, 90Hz, HDR10+
AMOLED, 68B colors, 185Hz, Dolby Vision, HDR Vivid, HDR10+, BT.2020, 4500 nits (peak)
Size
6.56 inches, 104.6 cm2 (~90.6% screen-to-body ratio)
6.9 inches, 116.6 cm2 (~91.5% screen-to-body ratio)
Resolution
1080 x 2376 pixels (~398 ppi density)
1200 x 2608 pixels, 19.5:9 ratio (~416 ppi density)
OS
Android 10, Funtouch 10.0
Android 16, HyperOS 3
Chipset
Qualcomm SDM765 Snapdragon 765G (7 nm)
Qualcomm SM8850-AC Snapdragon 8 Elite Gen 5 (3 nm)
CPU
Octa-core (1x2.4 GHz Kryo 475 Prime & 1x2.2 GHz Kryo 475 Gold & 6x1.8 GHz Kryo 475 Silver)
Octa-core (2x4.6 GHz Oryon V3 Phoenix L + 6x3.62 GHz Oryon V3 Phoenix M)
GPU
Adreno 620
Adreno 840
RAM
8GB, UFS 2.1
12GB/16GB
Storage
256GB UFS 2.1
256GB/512GB
UFS 4.1
Card Slot
No
Lens 1
48 MP, f/1.6, (wide), PDAF, Laser AF, gimbal OIS
200 MP, f/1.7, 24mm (wide), 0.5µm, PDAF, OIS
Lens 2
8 MP, f/3.4, 135mm (periscope telephoto), 1/4.0", PDAF, OIS, 5x optical zoom
50 MP, f/3.0, 115mm (periscope telephoto), 1/2.75", 0.64µm, PDAF, OIS, 5x optical zoom
Lens 3
13 MP, f/2.5, 50mm (portrait), 1/2.8", 0.8µm, PDAF, 2x optical zoom
50 MP, f/2.4, 18mm, 102˚ (ultrawide), 1/2.88", 0.61µm
Lens 4
8 MP, f/2.2, 120˚, 16mm (ultrawide), 1/4.0", 1.12µm
Features
Dual-LED dual-tone flash, HDR, panorama
Color spectrum sensor, LED flash, HDR, panorama
Video
4K@30fps, 1080p@30fps, gyro-EIS
8K@30fps, 4K@30/60fps, 1080p@30/60/120/240/960/1920fps, gyro-EIS, HDR10+
Lens 1
32 MP, f/2.5, 26mm (wide), 1/2.8", 0.8µm
32 MP, f/2.2, 21mm (wide), 1/3.44", 0.64µm
Features
HDR
Video
1080p@30fps
4K@30fps, 1080p@30/60fps
Capacity
Li-Po 4315 mAh, non-removable
Si/C Li-Ion 9070 mAh
Charging
Fast charging 33W, 57% in 30 min (advertised)
100W wired, PD3.0, QC3+, 100W PPS
50W wireless
27W reverse wired
22.5W reverse wireless
Sensors
Fingerprint (under display, optical), accelerometer, gyro, proximity, compass, color spectrum
Fingerprint (under display, ultrasonic), accelerometer, proximity, gyro, compass
Loudspeaker
Yes
Yes, with stereo speakers (with Dolby Atmos)
3.5mm jack
No
32-bit/192kHz audio
WLAN
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot
Wi-Fi 802.11 a/b/g/n/ac/6/7, dual-band, Wi-Fi Direct
Bluetooth
5.1, A2DP, LE, aptX HD
6.0, A2DP, LE, LHDC 5.0, ASHA, MIHC, Auracast
GPS
Yes, with A-GPS, GLONASS, GALILEO, BDS
GPS (L1+L5), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC, GLONASS
NFC
Yes
Yes
Radio
No
USB
USB Type-C 2.0, USB On-The-Go
USB Type-C, OTG