The verdict
Neither runs away with it: each wins something.
| Category | V15 | X21 |
|---|---|---|
| Design & display | 5.8 | 7.5 |
| Performance & hardware | 3.4 | 4.0 |
| Camera | 4.5 | 3.6 |
| Connectivity | 4.1 | 4.2 |
| Battery & charging | 3.7 | 2.7 |
Which one is for you?
vivo V15, if you care about…
- Battery Capacity
- 4,000 mAh
- against 3,200 mAh
- RAM Type
- DDR4
- against LPDDR4
- Display Diagonal
- 6.53″
- against 6.28″
- OS Version
- 9
- against 8
vivo X21, if you care about…
- Display Technology
- Super AMOLED
- against IPS LCD
- Bluetooth Version
- Bluetooth 5.0
- against Bluetooth 4.2
- Weight
- 156.2 g
- against 189.5 g
- Body Thickness
- 7.4 mm
- against 8.5 mm
Specification comparison
Performance
| Specification | V15 | X21 |
|---|---|---|
| Processor Model | MediaTek Helio P70 | Qualcomm Snapdragon 660 |
| Processor Process Size | 12 nm Best value | 14 nm |
| Graphics GPU | Mali-G72 MP3 | Qualcomm Adreno 512 |
| Storage Type | eMMC 5.1 | eMMC 5.1 |
| Maximum CPU Clock | 2.1 GHz | 2.2 GHz Best value |
| Maximum Storage Capacity | 128 GB | 128 GB |
| AnTuTu Score | 179,640 | — |
| Geekbench 6 Single-Core | 329 | 342 Best value |
| Geekbench 6 Multi-Core | 1,066 | 1,232 Best value |
| CPU Description | Octa-core (4×2.1 GHz Cortex-A73 and 4×2.0 GHz Cortex-A53) | Octa-core CPU with 4 × 2.2 GHz Kryo 260 Gold cores and 4 × 1.8 GHz Kryo 260 Silver cores. |
| Processor Type | Octa-Core | Octa-Core |
| 64-Bit Processor | Yes | Yes |
| RAM Capacity | 6 GB | 6 GB |
| RAM Type | DDR4 Best value | LPDDR4 |
| Expandable Storage | Yes | Yes |
| Maximum memory card | 256 GB | 256 GB |
Design
| Specification | V15 | X21 |
|---|---|---|
| Body Colors | Blue, Red, Black | Black, White, Red |
| Body Thickness | 8.5 mm | 7.4 mm Best value |
| Body Width | 75.9 mm | 74.8 mm |
| Body Height | 161.2 mm | 154.5 mm |
| Weight | 189.5 g | 156.2 g Best value |
| Usable Surface | 85.6 % Best value | 85.2 % |
| Body Materials | Glass, Plastic | Glass, Aluminium Alloy Best value |
| Unfolded thickness | — | 7.4 mm |
Battery
| Specification | V15 | X21 |
|---|---|---|
| Battery Capacity | 4,000 mAh Best value | 3,200 mAh |
| Battery Type | — | Li-Ion |
| Fast Charge Power | 18 W | 18 W |
| Battery Features | Battery Level Indicator, Fast Charging, Rechargeable | Fast Charging, Battery Level Indicator, Rechargeable |
Display
| Specification | V15 | X21 |
|---|---|---|
| Display Aspect Ratio | 19.5:9 | 19:9 |
| Display Technology | IPS LCD | Super AMOLED Best value |
| Display Diagonal | 6.53″ Best value | 6.28″ |
| Display Horizontal Resolution | 1,080 px | 1,080 px |
| Display Vertical Resolution | 2,340 px Best value | 2,280 px |
| Display Pixel Density | 395 ppi | 402 ppi Best value |
| Display Features | Gorilla Glass 5, Touchscreen | Gorilla Glass 3, Capacitive Touch, Touchscreen |
Sensors
| Specification | V15 | X21 |
|---|---|---|
| Fingerprint Sensor Placement | Rear | Rear |
Sensor
| Specification | V15 | X21 |
|---|---|---|
| Sensor Features | Fingerprint Sensor, Accelerometer, Gyroscope, Proximity Sensor, Compass | Fingerprint Sensor, Accelerometer, Proximity Sensor, Compass, Gyroscope |
Software
| Specification | V15 | X21 |
|---|---|---|
| Operating System | Android 9 | Android 8 |
| OS Family | Android | Android |
| OS Version | 9 Best value | 8 |
Connectivity
| Specification | V15 | X21 |
|---|---|---|
| SIM Configurations | Dual Nano-SIM | Dual Nano-SIM |
| Cellular Bands | 2G GSM 850, 2G GSM 900, 2G GSM 1800, 2G GSM 1900, 3G UMTS B850, 3G UMTS B900, 3G UMTS 2100, 4G LTE B1, 4G LTE B3, 4G LTE B5, 4G LTE B7, 4G LTE B8, 4G LTE B38, 4G LTE B40, 4G LTE B41 | 2G GSM 850, 2G GSM 900, 2G GSM 1800, 2G GSM 1900, 3G UMTS B850, 3G UMTS B900, 3G UMTS 1900, 3G UMTS 2100, 4G LTE B1, 4G LTE B2, 4G LTE B3, 4G LTE B5, 4G LTE B8, 4G LTE B34, 4G LTE B38, 4G LTE B39, 4G LTE B40, 4G LTE B41 |
| Cellular Technologies | GSM, HSPA, LTE, 4G | GSM, CDMA, HSPA, UMTS, LTE, 4G |
| Wi-Fi Standards | Wi-Fi 802.11a/b/g/n/ac, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac) | Wi-Fi 802.11a/b/g/n/ac, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac) |
| Wi-Fi Features | Dual Band, Wi-Fi Direct | Dual Band, Wi-Fi Direct |
| Bluetooth Version | Bluetooth 4.2 | Bluetooth 5.0 Best value |
| Bluetooth Profiles | A2DP, LE | A2DP, LE |
| Navigation Systems | GPS, GLONASS, BeiDou Best value | GPS, GLONASS |
| Connectivity Features | 3.5 mm Audio Jack, FM Radio, microUSB, USB OTG | 3.5 mm Audio Jack, FM Radio, USB OTG, microUSB |
| USB Version | microUSB | USB 2.0 |
| SAR American Head | — | 0.57 W/kg |
| SAR American Body | — | 1.18 W/kg |
| Max. download speed | 300 Mbps | 300 Mbps |
| Max. upload speed | 50 Mbps | 50 Mbps |
Audio
| Specification | V15 | X21 |
|---|---|---|
| Microphone Count | 2 | 2 |
| Audio Features | Loudspeaker | A2DP, LE, Loudspeaker, 32-bit/192 kHz Audio |
Technical
| Specification | V15 | X21 |
|---|---|---|
| Model numbers | 1819 | 1725, X21A |
