It'll be all about the Arkle for Peddlars Cross I reckon, even if the RSA trip may suit better.
Just curious why you think the RSA trip will suit him better?
This is a horse who mixed it with the best over hurdles at 2m achieving a rating of 170. He also showed himself to be excellent over 2m4f as a Novice but i struggle to see how it could be argued that the RSA trip will suit him better than the stiff 2m of the Arkle.
I would be hopeful that he might make up into a 3m chaser in the future but i would be astounded if they took the staying route in his novice season.