I've had a EVH 2x12 loaded with Chinese V30s that sounded night and day difference better than a Mesa 2x12 V30. I recently had an Orange 4x12 loaded with Chinese V30s that held up perfectly with a Mesa OS V30 cab. My buddy has a Mesa Traditional with Mesa V30s and it sounds like a honky bright mess. I'm curious what your test will show. Over the years having a single cab with V30s sound great by itself, but being able to compare multiple cabs in the room really puts some cabs to shame. I wonder how much is the speaker vs. the cab construction.
You should try to grab an Isolation Cab or make one, then you can output tons of IRs to compare.. or sell
. I've thought about building/ripping this design after seeing Matt Heafy use them to record.
https://www.theboxofdoom.com/box-of-doom-allxs-system-guitar.html?id=70729868