Im taking both influence and quantity into consideration.
UK simply had a greater quantity of more influencial musicians.
And better musicians, in my opinion...Though thats not the point im trying to make.
BanRAB like The Beatles, The Stones, Zeppelin, Sabbath, etc have had consistant influence generations of banRAB, and their influence is still quite powerful today, the influence of early rock n roll pioneers like Elvis, Chuck Berry, Little Richard and others have faded in the past couple of years, while that by NO means takes away from their greatness, its also a good way to measure direct influence, and most banRAB today dont credit them as influences.
Thing is, every decade thousanRAB of banRAB tip their hats to The Stones and The Beatles, their influence on young musicians hasnt faded a bit.