last year id go with breck. this year forsure keystone. Solely basing my opinion on the park being on point from preseason till now, the park staff fucking kills it, always adding fun features and keeping it flowy. don't get me wrong breck has an unreal park, but its nowhere near complete right now.
Keystone has an unbelievable preseaon park, and A-51 is the best for park laps once its up.
So basically keystone at this point in time, but once everything is complete in both, id say they are pretty damn equal.