Both the phones have their pros and cons, but I think you should go for Samsung J7 Nxt.
Samsung Galaxy J7 Nxt has the following advantages over Vivo Y53:-
1.Samsung Galaxy J7 Nxt has 1.6GHz Processor while Vivo Y53 has 1.4GHz Processor.
2.Samsung Galaxy J7 Nxt has 13MP Main Camera while Vivo Y53 has 8MP Main Camera.
3. Samsung Galaxy J7 Nxt has Latest Android v7.0 while Vivo Y53 has v6.0 Android version.
4. The battery of Samsung Galaxy J7 Nxt is 3000mAh while Vivo Y53 has 2500mAh Battery.
It is not like that it is a one sided game, Vivo Y53 has the following advantages -
1. Price of Vivo Y53 is Rs.8,875 while the price of Samsung Galaxy J7 Nxt is Rs. 11,490.
2. The weight of Vivo Y53 is 137 grams while Samsung Galaxy J7 Nxt has 170 grams weight.
Verdict- In my opinion, Samsung Galaxy J7 Nxt is a better phone in overall performance but if you need a phone with good camera and in terms of weight than you can go for Vivo Y53.
you can also see the comparison between the devices on 91mobiles: Samsung galaxy j7 nxt vs vivo y53