Chopper88
39
5131G
While both are brilliant watches, my choice would be the 5131. Although, that could change back and forth some more times in the future 
I love the shape of the 5131, it's definitely recognisable, and why I like most PP watches.
I like the details put into the 5160, beautiful engraving, especially great in combination with that hunter case... But I really dislike the the leap year indication window's position.
So the 5131 would have a slight edge for me at those points.
On the point of finishing and craftsmanship, the 5160 wins hands down for me, just wished they had put it into a slightly more modern styled case (just slightly, by making the lugs a tad more round), and moved that leap year window.