they arent the same to be honest. they just look alike. their innards and capabilities are vastly different fromt he effects dynamics to the polyphony count to the system speed. they just look alike and have similar functions but synthesis wise.. the es is leaps and bounds past the classic. honest. i had them both for about 5 months at a time. the original i had since sep 03 and the es i had with me from 3/04 to 8/04. trust and believe. they may look the same and operate similarly but the guts are totally different.