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  3. Y21 vs Redmi Note 15 4G

Vivo Y21 vs Xiaomi Redmi Note 15 4G

What Y21 does better (10) and where Redmi Note 15 4G wins (12) — every spec side by side.

Vivo Y21
Vivo · 2026Y21
7.5Score
10 advantages≈ $190
vs
Xiaomi Redmi Note 15 4G
Xiaomi · 2026Redmi Note 15 4G
7.5Score
12 advantages≈ $205
Higher score
6.6Display8.5
4.1Camera6.4
8.4Battery7.8
6.8Features5.8
Dimensions

Size comparison

Y21Redmi Note 15 4G
77.1 × 167.48.475.4 × 1647.9
Y21Redmi Note 15 4GDifference
Height167.4 mm164 mm+3.4 mm
Width77.1 mm75.4 mm+1.7 mm
Thickness8.4 mm7.9 mm+0.5 mm
Weight209 g184 g+25 g

Drawn to the same scale from the official dimensions (front and side).

Why is Y21 better than Redmi Note 15 4G?

  1. 5GYes · Redmi Note 15 4G: No
  2. Wired charging44 W vs 33 W+33%
  3. Battery capacity6,500 mAh vs 6,000 mAh+8%
  4. Water resistance (IPx)IPx5 vs IPx4+25%
  5. 3.5 mm headphone jackYes · Redmi Note 15 4G: No
  6. Energy classA vs B
  7. CPU frequency2.4 GHz vs 2.2 GHz+9%
  8. Battery charge cycles1,600 vs 1,000+60%
  9. Endurance per cycle67 h vs 55 h+22%
  10. Charged in 30 min42% vs 38%+11%

Why is Redmi Note 15 4G better than Y21?

  1. Main camera50 MP vs 108 MP2.2×
  2. Peak brightness1,200 nits vs 3,200 nits2.7×
  3. OLED panelNo · Y21: Yes
  4. Storage (max)256 GB vs 512 GB2×
  5. Pixel density260 ppi vs 388 ppi+49%
  6. Selfie camera5 MP vs 20 MP4×
  7. Weight209 g vs 184 g+14%
  8. Resolution (width)720 px vs 1,080 px+50%
  9. Wi-Fi standardWi-Fi 4 vs Wi-Fi 5+25%
  10. Thickness8.4 mm vs 7.9 mm+6%
  11. Main camera aperturef/1.8 vs f/1.7+6%
  12. Screen-to-body ratio85% vs 89.7%+6%
Specifications

Side by side

Vivo Y21Vivo Y21≈ $1907.5
Xiaomi Redmi Note 15 4GXiaomi Redmi Note 15 4G≈ $2057.5
Design
Weight209 g184 g
Thickness8.4 mm7.9 mm
Height167.4 mm164 mm
Width77.1 mm75.4 mm
FramePlasticPlastic
BackPlasticPlastic
Ingress protectionIP65IP64
Water resistance (IPx)IPx5IPx4
Glass protection—Gorilla Glass 5
ColoursChampagne Gold, Midnight BlueBlack, Forest Green, Glacier Blue, Purple
Display
Screen size6.7″6.8″
PanelIPS LCDAMOLED
OLED panelNoYes
Resolution (width)720 px1,080 px
Resolution (height)1,600 px2,392 px
Pixel density260 ppi388 ppi
Refresh rate120 Hz120 Hz
Peak brightness1,200 nits3,200 nits
Measured brightness—1,144 nits
Screen-to-body ratio85%89.7%
HDR—Yes
Performance
ChipsetMediatek Dimensity 6300Mediatek Helio G100 Ultra
Chip makerMediaTekMediaTek
Process6 nm6 nm
CPU cores88
CPU frequency2.4 GHz2.2 GHz
GPUMali-G57 MC2Mali-G57 MC2
AnTuTu score—581,234
Geekbench 6 (multi-core)—1,705
Memory
RAM8 GB8 GB
Storage (max)256 GB512 GB
Storage (base)128 GB128 GB
Storage typeeMMC 5.1UFS 2.2
Memory card slotYesYes
Camera
Main camera50 MP108 MP
Main camera aperturef/1.8f/1.7
Main sensor size—1/1.67"
Rear cameras11
Optical stabilisationNoNo
Ultra-wide cameraNoNo
Telephoto cameraNoNo
Max video1080p1080p
Selfie camera5 MP20 MP
4K selfie videoNoNo
Battery
Battery capacity6,500 mAh6,000 mAh
Battery typeLi-IonLi-Po
Wired charging44 W33 W
Charged in 30 min42%38%
Wireless chargingNoNo
Connectivity
5GYesNo
eSIMNoNo
Dual SIMYesYes
Wi-Fi standardWi-Fi 4Wi-Fi 5
Bluetooth—5.3
NFCYesYes
USBUSB Type-C 2.0USB Type-C 2.0
USB version22
Infrared port—Yes
Satellite navigationGLONASS, GALILEO, BDS, QZSSGLONASS, GALILEO, BDS, QZSS
Features
Stereo speakersYesYes
3.5 mm headphone jackYesNo
Fingerprint sensorSideUnder display
SensorsFingerprint (side-mounted), accelerometer, proximity, compassFingerprint (under display, optical), accelerometer, gyro, compass, proximity
SAR (head)—0.98 W/kg
Software
OS at launchAndroid 16Android 15
PlatformAndroidAndroid
InterfaceOriginOS 6HyperOS 2
Major OS updates promised—4
EU label
Energy classAB
Battery charge cycles1,6001,000
Endurance per cycle67 h55 h
Repairability classCC
Drop resistance classAA

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