Hey all. Had a rare opportunity to both A/B my Octabvre MKII w/ my buddy's MKIII. My buddy also happens to be the proud owner of an absolutely incredible Fodera Emperor Elite 6, so I had to tackle both at the same time! The video is still processing in HD, but you can see it here:
My opinion in short: The MKIII has more low mids and tracks a little worse than the MKII. There are some volume differences, but those can also be attributable to component value differences and EQ perception. The tonality is different between the two as well. Use the video as a reference for similar settings on both and glean from it what you can. I apologize that it's not more professional or edited at all; this was unplanned and very spontaneous as it occurred, as we did not have much time to hang out. But I hope it helps someone out there!