I’ve owned a KK++, a Rockmonster, and a Hermansson 3-Stage Marshall. The Gower amps and the Hermansson couldn’t be further apart.
The Gower stuff is “juicier” and based more in a Jose-style sound/feel. Like a super modern Friedman BE.
The Hermansson is something else entirely. A wild amp with a tight, dry, gnarly sound. Imagine a Marshall that has the harmonic content of a Boogie Mark and the cleanup/morph of a Carstens Grace.
The Gower stuff is easier to dial in, especially the RM. Just plug in and you’ve got Sykes, Corgan, Jones, etc immediately. The KK is a little more nuanced and has more options but easy enough to manage.
The Hermansson is more complicated and has a ton of configuration options. I think there’s five switches on mine. Don’t be afraid to play with all the switches. It’s like a Bogner insofar as you may need to use some extreme settings with it. I run mine with the presence, mids, and treble maxed and the bass at like 4, lol.