Stastny has been grossly inconsistent throughout his career, and the source of any optimistic press for this guy seems to stem from his pedigree and potential - both are practically irrelevant now.
For me it boils down to team and linemates. Colorado is bad and Montreal is not. The Canadians probably have one of the strongest group of front 9 in the league (after the Blues and Sabres, maybe). I just like them (and him) a lot more.