I like both... except you have to admit Stephen Tyler sucks at singing now... just listen to the National Anthom he sang at the Patriot's game last night.
Stephen Tyler is a very good artist for Aerosmith which was one of the best bands ever. But he is pretty old know and is very good for his age still. Also he doesn't use autotune like many other dance singers do like Black Eyed Peas.
If you just come up with a one word answer, it is not enough. This thread could lead to spamming users saying "rock" or "op". Can you at least tell why you picked that, or something like that? I would have to go with pop, because I find the instrumental part of the songs intense.