I've played many gigs with a 2x10 Horizon bass cab with a Trace Elliot GPSM7 300 head and have been told to turn down by the management or guys and gals in whatever band I was playing in. Many of the gigs I get are club gigs or bar/grill type gigs where I almost never get a chance to turn up. For awhile I thought people in my area don't like bass. It could have been meI was just thinking instead of having two old backup heads, the trace and the swr, I'd sell one of them and pick up the aggie 350 as a backup. The only pedal I have is a boss chorus and I hardly ever use that.
Makes sense.
Per my previous point, remember, wattage has little to do with volume. It is all about having the appropriate wattage for a given cabinet that will allow you to play dynamically without hitting the limiting of the amp. You are correct that 150 or 200 more watts will not be very noticable regarding absolute volume, but it can literally change your life when you are digging in at the end of the night
It all depends on absolute wattage also, not just the 'increase'. Going from 500 to 700 watts, for most, is not really noticable, since most cabs can't even handle the 500 watts. However, going from 175 watts to 300 watts at 8ohms can be the difference between 'Ok' and 'Great'.
IMO and IME!

I've had a few experiences like that with past gear, so I feel your pain.
I'm looking forward to doing an A/B to see if there are any noticeable differences. Then I'll be putting one on the chopping block to spread the Puma love! I want more people to find out how awesome these little amps are!!