CodePoet
Fractal Fanatic
Listening closely, I can definitely hear differences between them. If I listen to the dynamics and distortion as notes decay, #2 definitely performs the worst. The distortion remains about the same from attack to decay - real amps breathe and clean up as the signal gets lower. #3 does better with that, but has some kind of aliasing/congestion that isn't as pure as the first and last ones.