If I had a choice between a pre 64 and a new SC 70 I would choose the SC made 70.
Honestly, if I had to make a decision on which one to keep out of my pre-64 model 70 30-06, my classic sporter 30-06, and my new SC made model 70, I'd pick the pre 64. It is smoother, more accurate thus far, tried and true. The real rifleman's rifle.