I have the R and the arc. I find the throttle R to be a heavy hooking ball for a reactive. It goes long and snaps hard. Saves all the energy for the back end flows through the heads with smooth ans ease. My arc is more of an oil ball. From what I have seen of the Throttle. It would outhook my arc by at least 8 boards. My arc bascially isn't a superhooker but it will make it back from anywhere if I adjust my speed right. I find that ball to be all about movement. Plus around here it burns up due to lack of oil. I haven't seen anyone shine one up yet. Last night  I tried both and found I had more pocket angle with the R than the arc and it would comeback from way out deep with a bit of speed on the ball. Where I would had to slow down the arc to get it to roll into the hole. I have bowled 6 games with my R and have not one ten pin to show for it