WyldCFH
Drop a Gear and Disappear!
That's better than the Diavel S @139 rwhp. If only it could match the V-Max, then we could absolutely call the Rocket the king of the muscle cruisers!
It's the torque that makes it for the R3.
Based on HP alone, the Diavel has a better power to weight ratio
R3 642/157 = 4.09 lbs/hp (this is using the TFC power figures from Art in OP and the reported weight of the TFC)
Diavel 538/139 = 3.87 lbs/hp (this is curb weight, making it even better as the TFC figures are dry weights)
Not a lot, but one figure is not enough to claim superiority unless that is all someone cares about.