I started out looking for a used S I could afford, that is new enough (~2016+?) to have hardware compatible with auto pilot, and failed. So, I ordered a long range AWD Autopilot 3, and it's scheduled for delivery *this Saturday*. (Yay!) Then today someone sent me info about a 2016 S 75D AWD that (maybe) I can afford. I really need help understanding realistically what the differences between these two cars would be. Any inputs would be greatly appreciated.