I agree it would be easy to tell the difference. I've got both the M22's and the M60's and although they share the same tonal characteristics, there's still a difference in detail and fullness of sound. It doesn't seem like it's just an issue with bass.

M60s
VP150
QS8s
Marantz SR6003
Samsung LN52B550
Oppo DV-980H
Insignia NS-WBRDVD