Keep in mind that some of the stuff he writes is BS:
1- the brakes on the RR and F4i are THE SAME!!!!!!!! the change happened in 05 when they went to Radial brakes.
2- the gear box and clutch are also THE SAME!! except in 05
3- The reason that the RR pulls better is different gearing you can put that gearing on your bike and have the same effect.
4- Power in the new F4i is about the same as the RR except that it's tuned down a bit from factory but with a full system, BMC race filter and a PCUSB with a map, you are there.
So what I'm saying is don't put much into this article it's just one guy's .02