Softer at F.T.P. My SNG results are soooo much better there. I play my cash games mainly at Stars, but only the occasional SNG there. BTW, I love the $5 6-man SNG's at F.T.
I played about 100 $5 sngs on each site. 11% ROI on pokerstars, 35% ROI on full tilt poker. But Full Tilt Poker was later in my poker career, so it may be due to my playing better instead of Full Tilt Poker being softer than PokerStars. And anyway, 100 sngs is a tiny sample, so it may all be due to variance.