There was a German guy Kohle or some such on YT
He was saying there was some difference in doping on the outer edge with the Mesa having a bit more by contract than the standard V30.
I agree it probably makes very little if any difference
Like some guys ( Fricker) said there was a dust cover difference in the early Chinese made ones that he claimed affected the sound. That may have been John Brown. Who shot out a bunch of various V30s
In the charts John showed on his video
There was some difference, but I didn't hear any audible difference in any clip of his.
I don't think there is much a tweak of a tone knob can't adjust for
And nothing an audience could detect