A:
bigfishken said it right, they are both solid lures, but which one works for you depends on where you fish and how you fish and what you are fishing for.
As a mostly smallmouth fisherman, I prefer the RS series. The 'suspend' is the best piece for me. Think crankbait that you can turn into a jerk bait at will. If you try this with any other crank bait, it rises on the pause - real bait fish don't rise when they stop swimming. I've found that the jerk after the pause is when the fish hit.