I don't know anything about it, BUT I would suggest checking the weight limits on both and if the citi mini is higher go for it. Buying a cheaper stroller isn't worth it if you're going to have to upgrade again anyway.
I also heard that you can get last years model for slightly cheaper, too, so that may be an option.
So, yeah, totally didn't answer your question at all, but I'm sitting here wishing I'd purchased the citi elite several years ago instead of the citi mini (the elite didn't even exist when I bought mine I don't think, lol).