motoroilmccall
ArboristSite Guru
Mine has never vapor locked either, actually I usually don't run premium. But I don't think that will make a difference in vapor locking.
Also between you and your buddies saw, there is going to be some differences, between the two of you, you may run yours a little better, and maybe you can get your chain sharper then his. I really don't think there is much concerable difference between the two to be worried about.
Oh I'm sure they are darn near identical. I know I can run a sharper chain than he can, and I get a little more aggressive with rakers because I can (he weighs in at about 180, I'm 240 , he's always whining about kickback...)
I just put on the 25" Bar and the Skip Chisel chain, and its right about the speed where he is with full comp on a 24" bar. That oughta tell you how aggressive I can run it.