You should have a way to compare two groups to see how many/what percentage of the SAME people are in both groups, and how many are actually different members.

I am like, so many groups I am in, probably have the SAME people in them.... MOSTLY. Dunno 100% though, that's why I need a tool like this to find out something like this for certain.

Stats like this may give us a better understanding of the groups' behavior patterns.

For example, if two groups have pretty much 80% of the same members, maybe it's time to change the group's name and the agenda and find different members that want to try something else, u know?

Useful! :)