Very much hoping it passes muster (since mine arrives this week), and will be looking forward to your write-up. The first difference I notice between the two is the angle of the magazine. The mag position looks like its rotated forward a few degrees on the Marcolmar version; I remember them mentioning the purpose is to improve function with stanag mags.
Most unfortunate there can't be a third rifle - the original, with all of it's flaws - in the comparisons.
Very understandable that you'd want to hold back your initial impressions until the article comes out, but please shoot me a PM if you recommend telling my FFL to refuse to accept the package.