I had a 402 and sold it when I tried the 250.5. The Pass had WAY more authority, muscle, and clarity from top to bottom. The Mac sounded "soft". My speakers at the time were VR-4Jr.
Macintosh vs Pass labs
I currently own a Pass X250 which is awesome. I am driving Von Schwikierts VR4 SR also awesome. I have always wanted to try a Mac amp. However I am wondering why there are always so many for sale. Pass amps are few and far btween. Maybe th grass looks greener on the other side. Thanks