They are two completely different things.
Regret is when you do something wrong, and you never want to do it again. you take that action mindlessly and you don’t expect that consequence. So you regret in the end.
Pretty Simple and Common.
Whereas, Shame is completely different.
When you do something wrong, you know that it can lead to this and this consequence, you are aware of it completely, but you do that same thing deliberately.
You know that you gonna behaviour in this way only, when this situation comes again.
It’s the behavioural pattern which could be influenced by many things like past experience, current enviornment etc.
