Here's the X-Raps if anyone is interested. I'm guessing Bob is using the Countdown ... That's always been the standard for casting vs. the floating.I don't know for sure what makes it different than the old standard countdown for sure. I have an idea ... but what do I know?
http://www.rapala.com/rapala/lures/x-rap-series/?id=1
P.S. I did some research the lure has moving ball bearings in the lure to aid casting and action ... plus the rattle may be sexy to the fish too. Really nice finish on the lures!