With the Revv models arriving on Fractal the other day, I set up a little comparison preset between Cornford MK50, Diezel VH4 and the Revv models. They honestly weren't that far off from each other, like I could have probably spent more time and gotten them fairly close with vastly different EQ settings and picking one as a reference. I got far bigger differences out of each by just swapping between cabs.
To me this translates to the real world rigs too. When I had the Vox AC30-ish Victory VC35 and the Fender-meets-Marshall Bogner Goldfinger 45 SL, if I ran both of them into the same 4x10 with 10" Greenbacks the Victory ended up sounding far more Marshallish than if I ran it into a 1x12 with an Alnico Gold which brought in that Vox style chime.
People keep buying more amps because those are more exciting, but in reality would be probably better off buying more cabs.