Due to the topic, as well as the replies, I am going to lock this. You can make threads discussing the bands/singers, but making threads about how annoying they are, how much you hate them and so on should be left for, say, youtube.
Maybe we should be discussing their merits to give them a fair comparison. To say that both of them are "g@y" may be your opinion, it also may be true but, without reasoning to back it up, it is meaningless.
I don't like either the Jonas Brothers or Justin Bieber. Though, I give them both props because despite the fact that I disdain their music, I am still talking about them, they must be doing something right.
Now to the issue at hand. I would say that Justin Bieber is more annoying. I say this based purely on what I perceive as their individual talents. Obviously Justin Bieber is a pretty prodigious singer or maybe just a lucky kid with a good voice. However, the Jonas Brothers, or more importantly the one who plays guitar and drums and sings, is obviously multi-talented and at least attempts to have some creative control over his public life by actually writing songs.
I don't know about everyone else but, someone who can play an instrument and write music is always going to be less annoying than some asshole kid who was probably picked up at a mall and turned into a cookie cutter pop sensation, whose only creative contribution to his own existence is his personal brand of dou cheness.