'You think?' vs 'You can say that again'

[Olympian]

Hello,

Can 'you think?' and 'you can say that again' be used interchangeably? If not, what is the exact meaning of 'you think?' ?

These lines are from the movie The Bucket List.

Edward: But there was something about him......so when she said they were engaged I told her I was against it......but being my daughter, naturally......she went ahead and married him anyway. Needless to say, I wasn't invited to the wedding.
Carter: That must have hurt.
Edward: You think?

Thank you

[J&K Tutoring]

Yes, either of those two phrases could have been used, but Edward wanted to be sarcastic, so that's why he said what he did.

[Olympian]

Yes, either of those two phrases could have been used, but Edward wanted to be sarcastic, so that's why he said what he did.

@J&K Tutoring, thanks. Now I understand that 'you think?' has an element of sarcasm. Perhaps similar to when people say "Please!" (and don't mean it, but rather mean something like "come on!" or "give me a break!").