Rapid Fire is a backend beast for me, especially with the OOB finish. It calms down a bit and gets smoother after about 20 games or so. I have not thrown the Hy Road so I cannot compare directly, but my T-Road Pearl seems rollier for me, which some would call blasphemy on. In my opinion the Twin-V lends itself to skid flip, while the T-Road core is heavy rolling. The covers aren't really that much different, just a little bit of pearl in the Hy Road, and none in the RF, both have the same finish.
--------------------
-Clint