I had braces a few years ago and I have glasses now (I don't need to wear them all the time though, just for school really) and I would say I've gotten more positive attention with my glasses than I did when I had braces.
Yep =) I got glasses not to long ago, although I only need them to read, watch TV and be on the computer. I've gotten more attention since I got my glasses, then I used to before I had them. I think guys with glasses are hotter than guys with braces too.
It depends on the girl. It's a case by case basis. I would go against girl with braces because when I think of girls with braces, I think of 13-year-olds (and I'm 30...so...ew!). Although I know there are adults with braces, so I guess you could have a woman with braces be as hot or hotter than a woman with glasses - hence the case by case basis.