I currently have a CPO S on order (VIN P37xxx-ish, first registered around May 2014) that I'm awaiting delivery for (hasn't shipped yet). After borrowing a friend's car with the rear-facing seats and using them with kids, I kind of wish my CPO had them. I then found a CPO that is very comparable in terms of mileage, year, options, price and has the rear facing seats and I'm now thinking about switching before they ship the other one out. The other CPO is VIN P28xxx, so we're talking about a difference of roughly 8-9,000 in production VINs. I know that TSLA is constantly iterating and improving in terms of overall build quality over time, so my question is would there be a noticeable difference in build quality from these VINs? I know AP was ~Sep 2014, but beyond that what are the other important VIN thresholds to be aware of?