Hey Manasa,

This Platform is more about education not about Tech. Its different that Gadgets360. Still being a tech geek I can answer this question.

Go for Y2 If your Priority are taking selfies. As Y series is focused on Selfies and Entertainment more. And If You want a simple stylish looking phone go for redmi 6 pro. Whereas Both have the same processor. But still 6 Pro looks classy. You can go for Y2 As overall it's cheaper then 6Pro and better in many cases.

Best of luck