The Vivo V3 Max is a better phone as it gives a better processor than the Samsung Galaxy J7.
Processor: The Vivo V3 Max comes with the Qualcomm Snapdragon 652 MSM8976 processor whereas the Samsung Galaxy J7 comes with the Samsung Exynos 7 Octa 7580 processor.
Camera: The Vivo V3 Max has a camera of 13 MP with F2.2 aperture whereas the Samsung Galaxy J7 has a camera of 13 MP with F1.9 aperture. The Samsung Galaxy J7 is better with camera quality.
Check Full Comparison Vivo V3 Max vs Samsung Galaxy J7
yes marshmallow update is available in Vivo v3 max, you can follow the following steps:-
Charge your Vivo V3 Max to 100% to update Vivo V3 Max to marshmallow.
Then reboot your device.
Now you might get a message that marshmallow update or update is available.
Download the marshmallow update for Vivo V3 Max and you are good to go.
If you dont get a update.
Head to Setting.
About Phone>System Update.
Now search for marshmallow update for Vivo V3 Max.
If the update is available.
Now connect your Vivo V3 Max to internet to download marshmallow update for Vivo V3 Max.
yes marshmallow update is available in Vivo v3 max,