On looking at the brief details and knowing Berg cabs I would guess that the Forte HP is a new "world beater". You can compare numbers but they don't mean anything on their own. The Forte HP looks like it is closer to the B|amp than the Forte with many of the features but without the profiles (I don't have Berg cabs any more) and the confusing (to me) menu screens. IMO, weighing in at about 6lbs, the weight difference between this amp and the Puma is pretty inconsequential.
With Bergs it isn't a numbers game. If I'm reading correctly, the 1200 watts are there for tone, attack, heft(!!) and headroom, all reasons other than volume. I'll be interested in the reviews when they appear. It is pricey, but someone will buy one and decide they want something else in a couple of months. If they do I might just be waiting.
The WD800 also seems to be a feature rich "tone monster". I'll also be watching that one as well.
So far, in my experience, better amps create a better sound. From the feedback I get others notice the difference in my rig as well as me. Up to a certain point, the sound I aim to make is for the band and the audience. After that the rest is for me. If others appreciate it then great, but if I'm happy and confident I'll play better, and that's what is going to get me the gigs.