I can confirm the 2011 seat IS nicer than the 2010 seat. I think it's probably the same height, but it is narrower at the nose so your thighs are more comfy when feet are on the ground...has a bit more of a "bucket" to it too...a little more support behind your behind. Looks nicer too (IMO) not as much stiching and the material appeared a little nicer.
I'm thinking i'm gonna pick one up over the next few months... I'm trying REALLY hard NOT to have a new 2011 RGC in Sedona Orange connected to that seat.