They are pretty much equal. Facelifter pulls ahead if you are below 26 expertise skill but otherwise they have the same stamina and the same DPS (althought facelifter has slightly more on a decimal level. For paladins, the speed difference of .1 seconds means nothing, for warriors it's about the same but slightly better for heroic strike delivery. <---which is going away in Cata. So equal and the same, except for a small amount of dps and whether or not you favor hit or expertise in your current build. Neither stat is truly necessary.