I have an old Hiwatt DR103 and I agree it is drier sounding than Marshall’s. The Marshalls are more growly/hairy, warm and juicy/saturated, but the Hiwatt sounds bigger and more articulate than any Marshall I’ve tried and moves air like nothing else I’ve played before. Once you get it loud enough, the chugs on it are insane. After I heard those super big, heavy chugs I got on my Hiwatt, I went to one of my Cameron modded Marshall’s to AB, and while it had other things going for it like it’s roar/growl and juiciness, the chugs sounded weaker and less impressive in comparison and usually I’m very happy with how it chugs
The Hiwatt also has nice cleans and it’s eq knobs are way more responsive than Marshall’s. Honestly though I wasn’t impressed with the sound in that video and don’t think it gives an accurate representation of the Hiwatt sound
I can see though how lowering the treble/presence and raising the mids can get a Marshall to be in some ways more like a Hiwatt, but that won’t capture what I think makes them special, which to me is how massive and clear they sound. I still would probably choose a Marshall if I could only pick one between the 2 since I love their growl, but imo Marshall’s can’t do the Hiwatt thing or vice versa