I have seen both kits as well as the one i am using. All three ( Christofolini, 2F4R, and FHT) all are what i consider the top kits to run. Out of the 3 here is my opinion having seen them all in person when i was in Italy last.
FHT, is the biggest ports for the cylinder, most stunning crank with its setup of and use of Tungston for balancing, the Pipe left some to be desired in crafsmenship but over all i think will be the fastest complete kit. ( thats why i am using it)
2F4R had the nicest exhaughst port with the most ports, but not the biggest of the 3. The crank was really clean, but not so special in design. I did not get to see a pipe at that time
Christof had a really nice set up, the bore was basic not so radical ports, but very nice and clean. Top notch and i am sure top quality. The crank was very good, hard to say with out holding it in hand though. The pipe was superperb in design and finish. I met Chrisofolini at the show and he is really nice, and wow the bikes he had where amazing.
Any 3 of these kits would be top shelf above all others from what i have seen. So next it comes down to price and again all are at the top for a complete kit. I chose the FHT kit since i felt it would be the fastest out of the bunch. I may be wrong, but i think we just need to see? As my project develops i will let you know.