One thing about this comp is clear... the MR1 sounds terrible in comparison. I was really surprised by this, because I've done comps which don't show this at all. My gut feeling is (as tedy said in a later post) the unbalanced > balanced (and probably Hi-Z to Lo-Z) put the MR1 at a disadvantage.
A few years ago I started running my V3 (a)digi-out and (b) analog out into different recorders. I did this mostly for redundancy, but I did compare. At various times I ran Digi into my R4 or an H120, and analog into my R4 and MR-1. Generally speaking the result is the digi-out was a little "brighter" and the analog out was a little warmer. When I got home, I went with the better sounding of the two. The other source eventually gets trashed when I run low on disk space.
I have one comp that has been spared... Cowboy Junkies 4/3/2009, AKG414's > V3 > R4 (digi) and MR1 analog (using homebrew attenuators).
Go to
http://joe.bouchard.com/tunes/ and grab the "alternate_mr1_v3ad_samples.flac".
This alternates source every 15seconds. You can frequently here a little pop when it alternates because i didn't align the sources perfectly, but try to ignore that.
00:00 - 00:15 = analog into MR1 source
00:15 - 00:30 = digital into R4 source
00:30 - 00:45 = analog into MR1 source
00:55 - 01:00 = digital into R4 source
and it repeats like that until the end of the song
Using an M-audio Lightbridge firewire box as D/A > Senn HD280 headphones and my 48 year old ears, most of the transitions are "very subtle, and it's hard to say which is better". That's my opinion anyway. I also feel the same about the Mytek vs V3. I'm the one guy who voted "I think 2 sources are identical". I did enough of these informal and unpublished MR1 comps that I am happy to use the MR1 as my main recorder. My handy 2 track rig is Schoeps > Apogee > MR1 and I love it.