"It's made of Polar Tec Powerstretch as opposed to the Patagonia R1 which is made of Polartec Power Dry. I like the latter for it's superior wickability due to it's bi-component construction and I believe it's a little lighter fabric. Powerstretch is well, more stretchable."
I was going to made some snide comment, but am afraid it's going to come across horribly rude (It's been a really rough day at work) rather than than humorous as I meant it too be.
Anyhow, I think you've hit the pros / cons pretty well. The one thing that I like about what I see in the Ragged Mountain Hoody is that it's FULL zip as opposed to he half zip R1 (if memory serves, which is easily may be wrong). I like full zips (though a full zip with the offset zipper would be awefully nice)