Is the iPod Touch 5th gen better than iphone...

Which has better sound when listening to music, iphone or ipod touch 5 th gen. Is there any difference at all? Is there any reason to own both?

I have the ipod touch and decided to get an iphone 5. I have a few days in which I can return the ipod, unless there's a compelling reason to keep it.

Opinions, suggestions?

Thanks.