I'm not one for who's better but I have a friend who's into The Who and I've been into Led Zep on and off for years and when we were younger we would compare the two great bass players John Paul Jones and John Entwhistle. They had a lot in common. Both were clasically trained JPJ piano and organ Entwhistle french horn trumpet and tombone, both had very subdued performance styles and both were pivotal members of great live and recording bands through the sixties and seventies. There were real differences as well. JPJ was strongly influenced by James Jamerson and was more more traditional in his approach (bottom end etc) coming from a session muso background whilst IMO Entwhistles was more iconaclastic in that his influences are harder to pick and he had some techniques that were unique to him. JPJ was probably a better all round musician and arranger but Entwhistle was The Who's second songwriter and third singer. IMO there's no definative answer but its a discussion worth having.