Still marshmallow? lol Google already released Nougat months ago and is working on next Android 8 "Oreo" and these companies are still on 6...
good thing : it's using Pinecore chipset that has better perfmance than helio p20. It has been leaked by some china site
bad thing : no source code, no custom rom
Whether it uses a p20 or a S625 it will still be a downgrade compared to mi4c