No difference at all with the right bullet and load used between the 7mm-08 and the 270 if you reload. Case lengthand preference only a factor?
But, if you use factory loads only then the 270 takes the lead, ONLY because of the different factory ammo offered!

e-mail me if interested in a beautiful walnut and blue Ruger 77 MKII 270 that will shoot 5/8 inch groups at 100 with my 130gr BT reloads?