system
A chat on subreddit /r/wallstreetbets
human
While I agree that these words seem to represent slightly different concepts. Linguistically, they are interchangeable in every situation I was able to hypothesize. Can you think of any example where Clientele would be used but Clients couldn't, or visa versa? If so then you would be correct that they aren't the same, but I couldn't think of any examples where this was the case.

gpt
Vice* versa means other way around