the IR length effects the low end especially. but since i end up cutting muddy bottom end out of IR's (even on the axe-fx II) it appears that the IR length may not be too big a factor to me.

if you listen to the video's sound, you will hear more beef to the Redwirez IR. i think that's a good thing. more fullness is good. i have a couple Ownhammer IR's that are fairly neutral that get loaded up first thing just to test and see what the truncation will do to the tone.

i think that the best comparison will come when i load an IR in the gsp1101, then a/b it against the same IR loaded into the Epsi.