My wife and I own a 2016 S75 and love it. Our son is considering a CPO 2014 S85 with 20k miles or a CPO 2014 P85 with 40k miles. We would appreciate any insight anyone can give regarding which may hold its value better going forward. Neither car has AP1. Also, for those that have driven both and S and P version, do you feel the P is still worth it after time has gone by?