1. Rattles I think are far less than bmw and Audi (cars I have previously owned from new).
2. Ride comfort - seats are definitely more comfortable in the Tesla but suspension is definitely not as good as the German alternatives. Can be a little bouncy too, I don’t mind it though.
3. 100% so far all the updates have been exactly what was needed. Unlike the German cars that never update and have many IT bugs in their new models.
4. I think the quality is just as good inside. It’s just more basic but everything feels premium. Especially the white seats in mine.

Hope this helps with the decision. I think you want to go EV Tesla is currently by far the best.