The main was the fact that the X has two displays (one where a gauge cluster would be behind the steering wheel in a car, the other in the center between the tw

The main was the fact that the X has two displays (one where a gauge cluster would be behind the steering wheel in a car, the other in the center between the two front seats), whereas the 3 has one (just in the middle). So there are various functions that are on the X's main display (but not on the side display). I was used to keep checking my speed and all that on the 3 on the center display, but instead had to keep checking in the main one. Same with nav showing the next turn with your perspective. In the X it shows in the main cluster, but not in the MASSIVE map on the huge display. So I initially kept feeling unnerved not knowing when to turn. The 3 uses one stalk on the right hand side of the steering wheel to handle autopilot, Park, Reverse, everything. The X has another stalk for autopilot and cruise control and it's hidden behind the steering wheel. (my friend had to show me) so it's not obvious. The doors on the X open up differently, and by themselves. That's just weird. I don't like that the door auto-opens when I walk up to the car. It's a thousand papercuts. But that's for me as a Tesla driver where I already understand 95% of the concepts (even if I can't find the Autopilot stalk for example). I can't imagine how complicated it is for a first-timer who isn't playing with it in their garage for a couple hours.