Paul played like a guitarist playing bass guitar, Ox played like a bass guitarist playing bass guitar. It can be argued that Ox defined what it meant to be a "bass guitarist" more so than anyone had managed to do for the instrument up to that point. Paul's was a very musical approach and his melodic lines reflect that his style was purely meant to serve the song...the instrument was just a means of getting there. Ox's approach was to elevate the "tool" that was the bass guitar by bringing it to the forefront and using it in a way that put it on equal footing with the guitar as lead instrument. By doing so, he forever changed the role and status of the instrument in rock music and how it could and would be used from that point on, whether people choose to acknowledge it or not. While Paul's style was also immensely influential (yes, the bass can sound melodic!), its lineage can more or less be directly traced to James Jamerson, as his contributions were no small influence on Paul's melodic approach. All IMHO etc...