Can anyone explain to me what the difference between a "Karen" and a "Becky"?

Part of my confusion is because there are two different meanings of "Becky": Beyonce& #39;s "Becky with the good hair" and #BBQBecky. These are two completely unrelated Becky& #39;s.

So #BBQBecky IS a Karen.
Did I get that right?

There is no way Jay Z would cheat on Beyonce with *that* Becky!