Should I get the iPad mini 2 32 GB or the iPad mini 4 16GB ?

It really depends on how much storage and GB you want, and also how much you will be downloading onto it such as apps. I would personally go with the ipad that is the most affordable to stay in budget, to save money and with the most GB because you may change you mind about how much storage you want. I have never had an ipad before but I will be getting one soon for school.

I hope my response was helpful.