It seems one is overlooking an important point here. These styles are not supposed to be contemporary rock styles, or eighties styles or whatever. It is supposed to be late fifties and early sixties styles. So the drum sounds and mix on Audya and Tyros are authentic. The Korg has a very modern snare sound. The Roland an eighties sound, and Wersi, the wrong bass drum sound, too loud in the mix, just to pick on some details.
I think I should mention that the Tyros player is the one that really masters this old style. One of the best I ever heard.
Concerning sound quality, the sound in the fifties was not awesomely good either, but we manages to get the message.
casaet