I haven't seen any reviews say the handling is better.
Better
As for handling, here again it is slightly better than the Model 3. Despite the Polestar's weight you will be hard-pressed to endure any body roll thanks to excellent suspension aided by the EV advantage of having all the battery heft low down in the floor of the car.
Polestar 2 review: the best EV there is right now | WIRED UK
Push harder and the Polestar feels balanced and considered. Unlike the Tesla Model 3 (particularly in Performance spec), the Polestar 2 feels like a more in-depth interpretation of how to make an electric car feel dynamic and capable down a challenging road. That’s because it doesn’t seem to rely on a speedy steering rack or sticky tyre profile to ‘feel’ sporty, rather it relies on an inherent balance that’s surprising considering the Polestar’s XC40-derived chassis.
https://www.evo.co.uk/polestar/202867/polestar-2-performance-pack-review-ride-and-handling
Different
The 2 handles like a properly developed car, not a straight-line dragster that’s wayward in its responses. Better than a Model S? Certainly. Better than a Model 3? Different, as the car sits a little higher, but it’s bloody close.
Polestar 2
It feels more planted and grown-up than the hyper-pointy Tesla Model 3 rival.
Polestar 2 electric car review: we drive the Tesla Model 3 rival in the UK
Sorry to press you on the powered charge flap thing, but what exactly about it being powered makes it a quality of life improvement? I genuinely want to understand.
I've had ICE cars that pop the flap open on a button. My current car opens the flap on a push. Neither approach keeps me awake at night.