Interesting, I thought they were all 3 pretty damn close, not sure if an IR is being used. As others mention, 3 seemed a tad darker but nothing as bad as remarks I'm seeing, not knowing what the amp is it's hard to even want to guess, amps have different tone stacks and that's what defines them from my experience, so if the tone stack of the amp is actually on the darker side then it definitely is a factor. It could be any of the 3 that's the real amp, the beauty is the fact they are that close naked, in a mix forget it you'd never know. I am listening on a cell phone not a mixing console or headphones , regardless. Great stuff