I think the Beatles were more diverse just in that they wern't just driven from within the blues then out into hard rock.
The beatles could do a love song or a fun song or a rockin song or a heavy one with much different structures to the music than the stones do.

Take for instance Michelle,compared to Helter skelter or Revolution.
It isnt from the same music structure at all.
The stones are great and rule but they do stick more to their set ways, as do Ac/Dc for instance, but them even more so.