Neither can be better, it's just music, you can't judge it whether its better or not. Some people like rap, some people like rock, and others like both.
wikipedia is filled with some good stuff and also its filled with alot of junk too because you can write your own article there, which gives all those people who sit at home and come up with different theories and write them up.
So basically, listen to what you like.
P.S. Music will never die.