If you read between the lines of ad copy, Michelin has a pretty nice technical explanation of the considerations that go into EV-specific tire design:
https://www.michelinman.com/auto/auto-tips-and-advice/electr...
Apparently it's not just the weight, it's the instantaneous torque and noise that need to be considered. Lower noise and higher torque tolerance would, to me, imply a softer rubber compound is used, which would reduce longevity.
On the other hand, they also mention range and rolling resistance, which suggest that a harder compound might be used. Harder rubber typically corresponds to better longevity.
It's an interesting topic. Has anyone done a proper apples-to-apples test of EV tires versus their nearest equivalent "normal" tires?