the CZ has the original mauser 98 extractor system and inner C-ring breeching. It also has integral scope ring rails, though with a limited selection of rings that look good.
It also has a trigger system that has more parts than an entire Model 70, because it sets, if you find that of any use on a big game rifle.
The model 70, having a round top receiver, gives you more options with base and rings, if that matters to you. It also has a simpler trigger mechanism.
probably the biggest difference between the two rifle is European vs american styling.
For me, it would depend a lot on the caliber choice. 30-06/270 = Winchester Featherweight. 7x57 or 9.3x62 = CZ.........