Agh you're a tease, the suspense will be terrible but thanks for doing this. These are my guesses, but I'm taking you at your word that you really did take a third camera along and didn't pull a stunt like use the GH1's 1080 mjpeg mode or use upsampled 720p grabs as your "third camera" (we still remember the time you took a 7D downsampled still and compared it to a video grab and called them cameras "A" and "B". Fool me once....). Well here are my guesses, and FWIW I think they're the same camera throughout:
A - the 7D (a disappointment if true)
B - the GH1
C - a "real" camcorder
Comparison 4 is interesting, did you crop?
Choice number A consistently is the harshest looking, has the least detail and most stairstepping artifacts (again - no funny business, right?). I can't make out many jagged lines on C which makes me think it's not a DSLR or EVIL at all. It also has the most detail and a bit more grain. B has some aliasing on gently sloped lines but holds up surprisingly well
A - the 7D (a disappointment if true)
B - the GH1
C - a "real" camcorder
Comparison 4 is interesting, did you crop?
Choice number A consistently is the harshest looking, has the least detail and most stairstepping artifacts (again - no funny business, right?). I can't make out many jagged lines on C which makes me think it's not a DSLR or EVIL at all. It also has the most detail and a bit more grain. B has some aliasing on gently sloped lines but holds up surprisingly well