Well, they also upgraded the cover a bit on the Quest, in terms of particle load (I believe, if I am mistaken, sorry)...so I would say that you are going to see a little (maybe half a foot or a foot) cleaner reaction through the heads, because of the core, and then a very, very heavy roll, with a lot of traction in the oil...still pretty angular for a particle ball, but with a lot of that aforementioned "heavy roll."