Rob Miller wrote an answer about Patagonia R1 Fleece Pullover - Men's on September 4, 2010
It's a more fitted, athletic fit. They also look great I might add; I was eying them for a while until I decided on the Montane Oryx fleece jacket. Both are light, comfortable fleeces that are great for layering or stand-alone use in mild weather. The only reason I didn't chose this one in the end was that I was able to get the Oryx for cheaper.