With all due respect to THX, the reason I'd rather see video being compared, rather than screencaps, is because I want to see if the "wiggle" is the same. Not trying to be impossible, but having created my own crawl from the EoD documentary, I noticed a stark difference between the smoothness of mine to the wobble of the original (which, again, was preferable to me - I just haven't gotten around to adding "wiggle" to mine.)
When you've looked at these things frame-by-frame at high magnification, these are the little things that tend to stick out.