The wattage on your 4 ohm speakers would be the same...on 2 ohm speakers, the RF would produce more power..

 

I have the exact same set up but with the PBR300x2. I actually have two amps, one for my 6x9's and the final for the fairing and lowers.

When I first had the amps installed, I was seriously impressed with the power but quickly over time, I became greatly disappointed. There is a strong level of distortion with these amps. I had to lowers my gains to about 5/6 but with that, the sound volume is low. I'm not suggesting that the PBR's are not good quality, they are. But they don't pair well with Biketronic speakers. After nearly two frustrating monthsn my bike, I'm pulling them out and installing the Biketronic amp. Again, PBR's are good amps but if you like your music clear and strong, you may not like your Biketronic speakers paired with PBR's.

 

Specs say you would have the same, but it all depends on the birth sheet of the pbr's. They are all a little different. I've heard of some as high as 140 watts into a 4 ohm load.