Obviously it depends on the members, but I would say that the Indian society possibly celebrates Indian culture, food, maybe organises trips, etc.
Feminist is likely to be more political
Don't go mad at freshers. All sorts of societies are aiming on getting members as their funding depends on so many members. Often people go a bit crazy and sign up to all sorts then never turn up- or go to one event.
Before you sign up, just ask them what sort of stuff they do.