The 5070 gets my vote by far
But that doesn't mean I don't like the 5170. In fact I love it. I saw it more than once irl and if it was not so expensive I would start saving. But today Patek watches became too expensive for me :-(
But like Nicolas said, the case, dial, hands of the 5070 are imo better and I also don' t like these sunken subdials. But than again, I would be VERY happy if I could ever afford a 5170. Imo much better than the Dato, much better than the 5980 and much better than any classic 2 register chrono from AP, Breguet, GP, etc.
some pics to compare
5070
5170
the movement
5070
5170
Some say the 5170 has a better looking movement ... I don't agree.
Both are different. I can't say which one I like the most
the finishing of the 5070 is definitely not inferior
More pics to compare can be found here
5070 : No links, please. Even when they are very nice. (small-luxury-world)
5170: xxx
This message has been edited by small-luxury-world on 2012-11-01 08:39:00