Also given a good review: the Felix 2.0, as the big surprise - anyone familiar with it? Says it "prints well out of the box".
It uses SFACT for slicing, which I have never heard of. Prints slowly but has heated bed. Might beat out the Afinia.
Generally, the review seems to have been conducted early on for the UM2, so any recent software adjustments or printer issue improvements wouldn't have made it, and the article suggests as much. Whereas, the Replicator 2 is essentially an improved and upgraded version of last year's. At least that's what I took from the article.
The different filaments may be the ones that the manufacturers included with the printer - at least that's what I thought when I saw the blue used with the UM2 - it looks like the blue filament that ships with it.
What didn't look so great to me was the Form1 print. I expected it would be flawless given the technology it uses.