The RLP is slightly stronger overall than the Rebel (about 3-4 boards difference) and they both have the same coverstock. The RebeL is a special type of ball where it is angular, yet controllable at the same time due to the large core inside. I am in LOVE with the RebeL and have not thrown my RLP in a long time since the RebeL was released. The RLP for me was a little too over/under for my liking... so it is really a preference.
Both are great balls, but I would recommend the RebeL over the RLP due to the control it has!