I think that cholis look amazing. I like that general style of flowing draping clothing but a choli adds definition to the top and acts sort of like a midriff giving a sense of bodily pride, if that makes sense. It's the more interesting of the two in my opinion.
I'm not sure what a choli is but sarees are really beautiful! A friend at college got married a year ago and her white friends wore them so I got to wear one. I think it was quite a modern type but it was really pretty :)