It's about like comparing the .260 and the 6.5 Creedmoor. Hornady will have many believe that the Creedmoor is right on the heels of the .260 case but that's only going by Saami spec loading at 2.800. Run both at optimal performance and no comparison. Both those .270s are awesome. I'm not sure I could say one is much better than the other. It's simply a matter of preference as is many scenarios like this. Regardless which one outperforms the other, pick one, develop a great load and kill with it. Doubt the animal would know the difference either way.