Everything you could possibly want to know about tires types and tradesoffs: https://electric-scooter.guide/guides/electric-scooter-tires/
The only benefit to solid tires is that they they won’t get flats. For everything else they perform worse than pneumatic ones, including:
- worse grip (particularly when wet)
- worse ride quality (limited internal cushioning)
- tend to be much harder to change
If you’re going to be using the scooter on good roads, in dry conditions then downsides of solid will be less adverse. If roads are worse or you’ll be in wet conditions then downsides grow.
On thing I’d like to point out is that not all pneumatic tires are equal. Tubeless ones (like those in your car) are much more resistant to flats and when used with tire slime are very flat-resistant.
The Ninebot Max comes with tubeless pneumatic tires that are pre-slimed and riders will report getting puncture after puncture on the same set of tires, but a bit of the slime leaks out and re-seals the tire.