Grindspine
likes pointy things
I mean, he is doing a demo of the Mark IIC+ modes; that amp is pretty recognized as getting great Metallica through Dream Theater style sounds.Ola's comparison was pretty terrible IMO. I mean, maybe if you like just tight palm mutes over and over, they might sound the same. I usually tend to compare amps by hitting chords and notes that ring out. There are plenty of videos out there (Jeremy's above, has tons of others) that will show some clear distinctions between different IIC+s, let alone a IIC+ vs a MKIV or JP2C.
The demo gave my ears something to hear to compare the amps. They all sounded like 2C+ versions to me. There was a bit of something lacking from the VII, barely noticeable. The 2C+ and JP2C seemed to just hit a bit harder. He didn mention some minor differences in settings due to the VII not having pull pots and a bit more noise out of the original. I am glad that he also mentioned a tube difference, which may or may not make a huge difference between the amps, but at least he tried to be thorough in possible differences.
Those three amps sound like 96% the same to me, the JP2C and original both barely edging out the VII. Between the feature sets and the demo sounds I have heard so far, I would still opt for the Mark V 90 watt head over the VII or the JP2C, but not by much.