That’s not as easy a question to answer as it might appear, but honestly if you told me I had to keep just one, I’d be happy with either.
I know that might sound like I’m at risk of getting splinters on my derrière, but both have genuine pros and cons.
To the Tesla I’d give;
Software and App (although it’s not perfect) they seem to operate a roll out and ‘fix fast’ software model, the polar opposite of VW.
Performance (the M3 LR anyway, the GTX isn’t far behind an SR+ in the real world).
Efficiency, it is better than the GTX, but not a surprise given the shapes.
It’s still a car I drive just for the pleasure of driving, it does make me smile even though I don’t usually drive quickly.
To the ID.4 I’d give it;
Interior space and practicality, it’s noticeably more roomy, particularly head room, again not surprising given the shapes.
Ride and comfort, the Tesla is crashy and harsh in comparison, excellent on smooth tarmac though.
The main screen and steering wheel binnacle is much more readable for myself who needs reading glasses.
Build quality, living with both through the recent prolonged sub zero temps showed VW have put more thought into how a car works in such conditions. Nothing froze shut, including doors and charge flap. The cabin is also noticeable quieter and rattle free versus the Tesla.
We always thought that the SuC network would be a massive plus for the Tesla over the VW, but we just don’t seem to travel to places where they’re any more handy than other networks, but it is a seamless experience mostly.
As ever then, it’s swings and roundabouts, but we’re lucky to have both cars, and appreciate them both for what they can do.