Does the KH trials do rails better than the onza? and witch one do you think is better?
My friend has an Onza, and he doesn’t grind yet, but the pedals have huuge pins. So if you’re getting an onza, make sure to use grind plates too.
Not to negate your advice Potter, but I don’t really think that the pedals are the most serious parts. I think it was a reference to the cranks and hub.
As for advice, I have an Onza with Snafu pedals, and it grinds rails fine (bear in mind that the only time I’ve ever dsone a rail grind was about 20 times when I was trying to pedalgrab a round steel rail on a bike rack. So I was doing them seat out and in sidehop form. Kinda awkward, but I mistakenly landed it once) I think they’re kinda equal. The only thing is that the KH doesn’t have siderake and the pedal thread tube protrudes on the other side of the crank. This means that if you get the rail stuck between the crank and wheel it may be a bit more difficult to remove if you hit it hard. This happens in Tugboat’s video. The Onza doesn’t have this protrusion.
So even thought the onza cranks are profiled and more rounded it will still slide down rails fine?
Ive got a old onza and the cranks grind pretty well but i prefer flat cranks, the under side on the onza cranks where it is screwed in is the slippiest part of the crank 
Trev