I liked the Tesla software and easy supercharger access. The model Y also felt more spacious, especially in the trunk.
I would summarise it as a much better UX in the model Y.
- Cockpit -- EV6 has a panoramic (horizontal) display, plentiful buttons, and a heads-up display. I found this much more ergonomic for my eyes and hands than Tesla's all-in-one center-mounted display.
- Availability of Android Auto/CarPlay -- Tesla's software is more polished than Kia's but I'd rather project my phone. All my stuff's on it.
- EV6 is the #1 recommendation for its class in Consumer Reports as well as #1 in projected dependability for same.
- quality concerns (which possibly are overstated for the average purchase)
- worries over phantom braking
- V2L
- CarPlay
- I was swayed by Elon's politics, but that likely wouldn't have mattered if it had been a slam dunk decision for me.
- Supercharger network is a lesser concern for me, as I own my home. I did do a road trip from Houston to San Diego and back. As far as I could tell, between major cities, EA vs Supercharger coverage was equivalent along the relatively unpopulated stretches of I-10 and I-8
However, given the price differential now vs then, I would likely go for a low mileage used Model 3 now.