From pass labs xa60.8 to s500

Hi at all.
I have to monos amp xa60.8 pass labs.
I’m very happy, but i dont know which is the difference between my amps and msb s500.
Who can help me.

Ciao

@Nick69Ita , welcome to the forum! Where are you based? It may be possible to get you a demo to compare. It is a big leap to go in blind.