Cab vs. IR creating speaker IRs with react:IR (Driftwood , till end for goodie)

So I've got this St. Rock react:IR impulse response loader which is not only absolutely awesome in the way it interacts with the amps' power section and in how versatile it is for attenuation/silent recording etc, but it also comes with a software that makes it peepee-easy to create your own IRs... Here I'm gonna guide you through the process step by step and then we're gonna compare the miked tracks to the tracks that were reamped through the IR we captured.... sounds fun? there's also a possible goodie so