I have been using the Outdoor Research helium Down Hoodie the last few years and love it. It is lighter, cheaper, and more durable than the Stone Glacier. I love that it also has reinforced patches on the shoulders and hood.
The SG Grumman is definitely warmer by a smidge but you pay in $$ and weight. You can't go wrong with either but consider how warm you need it to be.
I don't get cold easy so the OR is perfect for me. I always carry the OR Helium, a quarter zip, and a rain jacket and that can get me through any weather down to the 20s no problem. If I get cold I can always just start hiking.