Those two clips are different from each other in three ways: cab, EQ and Depth. There's no way to draw a valid conclusion about the cab when so many other things have been changed.
The changes were made to e.q and depth in order to compensate the lack of cab IR.
The idea of a cab IR is basically an e.q, right? the target of this "test" is to hear a real cab setup once with a cab sim ON (which is some kind of e.q) and once without a cab block while using an actual G-e.q which is basically what the cab IR is and still you can hear that the sound is better with the cab block (cab sim ON) than with an actual e.q replacing it.
Everybody say " don’t use cab sim ON, use an e.q instead" but…. if we already have that "premade" e.q (cab IR), way not just use it instead of sculpting a new e.q from scratch to compensate the lack of cab IR (e.q)?