It won’t be basically the same car. It will be much better overall. Competition is really going to start pushing Tesla to improve. In particular, mainstream buyers aren’t going to put up with the quality issues that enthusiasts do, and Tesla knows that. With that being said, I wouldn’t expect the range to be dramatically better, just incrementally better. As the charging gets faster and the network better, it makes less sense to carry around heavy and expensive batteries.
There will be differences because of manufacturing equipment, possibly quality, but none of that has to do with the OPs list which are features and specs.
Model Y Freemont = Glove Box Model Y Germany = Schnitzel Box Model Y Austin = Taco Box Model Y China = Chopstick Box
If those people who are waiting for a better car from a different factory get in a serious car accident while waiting, they will have wished they were in a Tesla. You can't put a price (new features) on the safest vehicles ever made.
I imagine the new Teslas will be even safer than the current ones. I actually think that’s another good reason to wait just a little bit for the new ones.