Local roads are so far the biggest disparity to me between AP1 and AP2. AP1 makes mostly reasonable decisions in local conditions, but AP2 maybe goes 20 seconds before attempting to do something insane.
On the highways, I have to say, they're really really close now. AP2 is definitely superior since 17.26 if you drive at higher speeds (e.g above 70mph) on hilly and curvy roads. Those speeds seemed to push AP1 beyond its limits.