On this page we compare specs vivo iQOO Z7x Octa-core (2x2.2 GHz Kryo 660 Gold & 6x1.7 GHz Kryo 660 Silver) with vivo Y91 Octa-core (2x1.95 GHz Cortex-A53 & 6x1.45 GHz Cortex A53), we compare external dimensions, compare screens and performance, the amount of RAM and memory for storing media data, battery capacity and characteristics of photo cameras, compare the presence of various sensors and functions.
| Hardware and OS | vivo iQOO Z7x | vivo Y91 |
|---|
| Operating system | Android 13, OriginOS 3 | Android 8.1 (Oreo); Funtouch 4.5 |
| Processor | Octa-core (2x2.2 GHz Kryo 660 Gold & 6x1.7 GHz Kryo 660 Silver) | Octa-core (2x1.95 GHz Cortex-A53 & 6x1.45 GHz Cortex A53) |
| Chipset | Qualcomm SM6375 Snapdragon 695 5G (6 nm) | Qualcomm SDM439 Snapdragon 439 (12 nm) |
| GPU | Adreno 619 | Adreno 505 |
| Internal memory | 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM | 32 GB, 3 GB RAM16 GB, 2 GB RAM |
| External memory | microSDXC | microSD, up to 256 GB |
| Display | vivo iQOO Z7x | vivo Y91 |
|---|
| Type | IPS LCD, 120Hz | IPS LCD |
| Size | 6.64 inches, 106.8 cm2(~85.6% screen-to-body ratio) | 6.22" inc |
| Resolution | 1080 x 2388 pixels | 720 x 1520 px |
| Touchscreen | | capacitive touchscreen |
| Screen-to-Body Ratio | | 82.9% |
| Display area | | 96.6 cm2 |
| Display aspect ratio | | 19:9 (height:width) |
| Pixel Density | | 270 PPI |
| Colors | | 16M |
| Connectivity | vivo iQOO Z7x | vivo Y91 |
|---|
| 5G Network | 1, 5, 8, 28, 41, 77, 78 SA/NSA | |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct | |
| NFC | No | |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 2100 | HSDPA 850 / 900 / 2100 |
| 4G Network | 1, 3, 5, 8, 28, 34, 38, 39, 40, 41 | LTE band 1(2100), 3(1800), 5(850), 40(2300), 41(2500) |
| CDMA | CDMA 800 | |
| Wi-Fi | | Wi-Fi 802.11 b/g/n, WiFi Direct, hotspot |
| Network | | GSM / HSPA / LTE |
| SIM card | | Dual SIM (Nano-SIM, dual stand-by) |
| Technology | GSM / CDMA / HSPA / CDMA2000 / LTE / 5G | |
| Bluetooth | 5.1, A2DP, LE, aptX HD | 4.2, A2DP, LE |
| Edge | | Yes |
| GPRS | | Yes |
| GPS | | Yes, with A-GPS, GLONASS, BDS |
| Speed | HSPA, LTE-A, 5G | HSPA 42.2/5.76 Mbps, LTE Cat5 150/75 Mbps |
| USB | USB Type-C 2.0, OTG | microUSB 2.0, USB On-The-Go |
| Main Camera | vivo iQOO Z7x | vivo Y91 |
|---|
| Camera | 50 MP, f/1.8, (wide), PDAF
2 MP, f/2.4, (depth) | |
| Features | Dual-LED dual-tone flash, HDR, panorama | |
| Video | 1080p@30fps | |
| Selfie camera | vivo iQOO Z7x | vivo Y91 |
|---|
| Camera | 8 MP, f/2.0, (wide) | |
| Video | 1080p@30fps | |
| Camera | vivo iQOO Z7x | vivo Y91 |
|---|
| Main camera | | 13 MP, Dual |
| Specs | | 13 MP, f/2.2, PDAF
-2 MP, f/2.4, depth sensor |
| Features | | LED flash, panorama |
| Video | | 1080p@30fps |
| Selfie camera | | 8 MP, Single |
| Multimedia | vivo iQOO Z7x | vivo Y91 |
|---|
| Loudspeaker | Yes | |
| 3.5 mm Jack | Yes | Yes |
| Radio | | FM radio |
| Design | vivo iQOO Z7x | vivo Y91 |
|---|
| SIM | Dual SIM (Nano-SIM, dual stand-by) | |
| Colors | Black, Blue, Orange | Starry Black, Ocean Blue, Red (Y91i only) |
| Dimensions | 164.6 x 75.8 x 9.1 mm (6.48 x 2.98 x 0.36 in) | 155.1 x 75.1 x 8.3 mm |
| Weight | 205 g (7.23 oz) | 163.5 g |
| Features | vivo iQOO Z7x | vivo Y91 |
|---|
| Sensors | Fingerprint (side-mounted), accelerometer, gyro, proximity, compass | |
| Battery | vivo iQOO Z7x | vivo Y91 |
|---|
| Type | Li-Po 6000 mAh, non-removable | |
| Charging | 80W wired, 1-70% in 34 min (advertised) | |
| Battery capacity | | 4030 mAh, Non-removable Li-Po |
| Other | vivo iQOO Z7x | vivo Y91 |
|---|
| Release date | | 2018, November |
| Sensors | | Fingerprint (rear-mounted), accelerometer, proximity, compass |
