After testing on 10.4 and now on 2018.12 driving an AP1 and AP2 vehicle feel almost the same. I say feel as the binnacle display still doesn’t show adjacent lanes, but just because I can’t see it doesn’t mean autopilot can’t. I suspect even though the rendering on the display is different there are very similar things going on under the hood. Testing on different roads with different conditions both versions of autopilot perform nearly identically, with ap2 maybe having the edge in heavy rain and fog. This is exciting stuff and I can’t wait for “enhanced” features to pop up (and new maps lol)