5070 is an icon for Patek, based on the extremely rare model of ref 2571. Lemania based manual wound caliber. Near quartz accuracy (+1 s in 5 days for mine). Nothing compares to it. No spin-off references. (i.e., look alike references of 5070). So 5070 IS a 5070.
5960 is a creation. A creation with mesmerising dial-in-dial-in-dial. (I mean literally--I still get confused on how to read that big round thing). Automatic claiber with more parts than a 5004. Spinning off references in the future. (at least 5980).
So, 5070 is a Patek chronograph. Period.
Hope I haven't offended any 5960 fans here.
Larry