Vivo Y31 5G vs Oppo A78 5G comparison

Show Only Differences Highlight Differences	Vivo Y31 5G	Oppo A78 5G
key specs
Display	6.68-inch	6.56-inch
Processor	Qualcomm Snapdragon 4 Gen 2	MediaTek Dimensity 700
Front Camera	8-megapixel	8-megapixel
Rear Camera	50-megapixel + 0.08-megapixel	50-megapixel + 2-megapixel
RAM	4GB, 6GB	8GB
Storage	128GB	128GB
Battery Capacity	6,500mAh	5000mAh
OS	Android 15	Android 13
Resolution	1,608x720 pixels	720x1612 pixels
general
Brand	Vivo	Oppo
Model	Y31 5G	A78 5G
Release date	September 15, 2025	January 16, 2023
Launched in India	Yes	Yes
Form factor	Touchscreen	Touchscreen
Body type	Plastic	-
Dimensions (mm)	166.14 x 77.01 x 8.39	163.80 x 75.10 x 7.99
Weight (g)	209.00	188.00
IP rating	IP68	IPX4
Battery capacity (mAh)	6,500	5000
Removable battery	No	-
Fast charging	44W Flash Charge	Super VOOC
Wireless charging	No	-
Colours	Rose Red and Diamond Green	Glowing Black, Glowing Purple
display
Refresh Rate	120 Hz	90 Hz
Screen size (inches)	6.68	6.56
Touchscreen	Yes	Yes
Resolution	1,608x720 pixels	720x1612 pixels
Pixels per inch (PPI)	264	269
Resolution Standard	-	HD
hardware
Processor	2.2GHz MHz octa-core	2.2GHz octa-core
Processor make	Qualcomm Snapdragon 4 Gen 2	MediaTek Dimensity 700
RAM	4GB, 6GB	8GB
Internal storage	128GB	128GB
Expandable storage	Yes	Yes
Expandable storage type	microSD	microSD
Expandable storage up to (GB)	2TB	1000
Dedicated microSD slot	-	Yes
camera
Rear camera	50-megapixel (f/f/1.8) + 0.08-megapixel (f/f/3.0)	50-megapixel (f/1.8) + 2-megapixel (f/2.4)
No. of Rear Cameras	2	2
Rear flash	Yes	-
Front camera	8-megapixel (f/f/2.0)	8-megapixel (f/2.0)
No. of Front Cameras	1	1
Pop-Up Camera	No	-
software
Operating system	Android 15	Android 13
Skin	Funtouch OS 15	ColorOS 13
connectivity
Wi-Fi	Yes	Yes
GPS	Yes	Yes
Bluetooth	Yes, v 4.20	Yes, v 5.30
NFC	No	-
USB Type-C	Yes	Yes
Number of SIMs	2	-
Wi-Fi standards supported	-	802.11 a/b/g/n/ac
USB OTG	-	Yes
Headphones	-	3.5mm
sim 1
SIM Type	Nano-SIM	-
GSM/CDMA	GSM	-
4G/ LTE	Yes	-
5G	Yes	-
sim 2
SIM Type	Nano-SIM	-
GSM/CDMA	GSM	-
4G/ LTE	Yes	-
5G	Yes	-
sensors
Fingerprint sensor	Yes	Yes
Compass/ Magnetometer	Yes	Yes
Proximity sensor	Yes	Yes
Accelerometer	Yes	Yes
Ambient light sensor	Yes	Yes
Gyroscope	No	-
Barometer	No	-
Temperature sensor	No	-
Face unlock	-	Yes

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