Classic chronos... which would you choose?

[acarriles]

I want to get a traditional looking chrono, bi-compax, but with more modern dimensions. At this point, I am between the Girard Perregaux 1966 Chrono, or the AP Jules Audemars Gstaad Classic. The GP is 42mm and the AP 41mm, so not much difference there. Both have in-house movements, with an add-on chrono module, so again, both are similar there.

Besides the looks of the watch, it comes down to what you get for your money.
For about the same price, I can get the Girard Perregaux in 18K gold, but besides the brand not being up there with AP, the movement is not as nicely finished as the AP. The AP on the other hand is Titanium (vs 18K), but has a nicer (better?) movement ticking inside.

This particular GP has been discontinued, just like the AP, and both can be had at a very good discount BNIB. Which would you choose?