I'd say the 201 and 301 are identical except for the wattage, though I admit I've never owned a 201. The Omega series is the last word in Classe technology, and are slightly more advanced than the 01 series.
When built into the right system these amps sound great. They have good musical characteristics and provide lots of slam when you need it. I've owned at least four classe amps over the years and can testify that they look stunning sound great and are built like small Sherman tanks.
