How good is master volume on REVV Generator 50?

How good is master volume on REVV Generator 50? I mean: right now I have ENGL Ironball combo - 20W, lead volume at 8, master at 1 and it sounds good at my apartment. It sounds better on 20w than 5/1W with more master vol. So I like the master volume knob, but it must be really low (1-1.5) when lead channel volume is high. How about REVV? It's 50W (more than Ironball) - will it be a lot louder if I set channel and master volume similar to my current amp? It's 20W vs 50W. ENGL master vol below 1 sounds bad, weak, how about REVV with veeerrry low master vol?