Well the harmonics type part in fret 12 is about the same. As I play both on guitar. But the true musical great behind ELP is Keith Emerson. He is the best keyboard player in rock and roll history in my opinion. Others that deserve mention Elton John, Billy Joel, Lord, Wakeman, Preston, JPJ, and I dont know their names but the guys from Styx, Manfred Mann, and Allman Bros, Kansas, and sorry but I know Ive missed some other important ones.