When I switched from Coronation Ace blades (somewhere between beginner blades and very low freestyle) to MK Dance blades, a long while back, I skated much faster. The seller said that's because Dance blades are thinner at the bottom ("thin-line"). Speed is the biggest reason I have stayed with Dance blades.
A blade designer just told me that Dance blades, especially thin-line Dance blades are actually slower than Freestyle blades.
So, for those of you that have used both Dance and Freestyle blades (specify blade models), what are your experiences in this regard?