I believe both cams are very simular in performance, personally I would go with the EV-27, I have heard nothing but good reports from everyone that ever had one. They say that the valve train is a little noisier with this cam because it uses faster ramps, but that's what makes it work so well. I have also read that with the heavier Touring bikes it will work much better if the compression is raised higher than stock because the valve overlap reduces the static compression, with the heavier bike the performance of the cam suffers alittle without the compression increase. The lighter bikes can get a way using the stock compression. You can shave the heads or replace the pistons or even buy new high performance heads and pistons and it will really wake it up. It depends on how much money you want to invest. I have spent so much money already, it never ends, but if I decide to do it, most likely will be the EV-27 and maybe the Screaming Eagle heads and pistons. I am only dreaming at this point.