@themazcorner My wife and I had the same dilemma last fall! I really liked the Polestar 2 Performance. My wife liked many things about it too, we were both surprised how much we liked it. For me it was my top choice initially, for my wife it wasn't her top choice but she quite liked it too, and the next car after it will be one she picked out & preordered already (we need 2 cars going forward), so we ordered a Polestar 2 Performance with all the packs except leather.
Then Tesla restocked their demo fleet for Q4, we tested some Model 3's...and I liked the Model 3 Performance just as much, for mostly different reasons. And my wife already preferred a Tesla for range + supercharging. The P2P and M3P are very different cars yet I liked them about equally. For us these were the
major factors in cancelling our P2P order in favor of an M3P:
1) The additional range and efficiency of the Model 3 is very useful for our driving. We've been EV-only for many years with our 2013 Model S P85. Polestar 2 dual motor has basically the same range as that. Which works for us, yes, but we wanted more from a new car. With our M3P there's driving we do where we can comfortably skip any DCFC stop, which would be needed with a P2P (without hypermiling or cutting it uncomfortably close, which neither of us likes to do).
2) Here in the US the public DCFC hasn't caught up with the Tesla Supercharger network yet, as I'm sure you've heard. There's a rural area we drive in regularly - long distances between places - that has Tesla Superchargers but no public DCFC. I even contacted Electrify America to ask if they had any plans to expand in that area, they responded and were nice, but couldn't or wouldn't share anything. Also, we're completely used to the whole plug in and charge experience with Superchargers. Polestar 2 doesn't or didn't support "plug & charge" and my local Polestar reps couldn't promise that the car would ever support it. I have no interest in fiddling with payment methods, touchscreens, etc just to get a DCFC charge going.
3) Based on our test drives, and how vastly better the P2P Öhlins DFV suspension was compared to the M3P suspension, my wife gave me permission to put Öhlins DFV on our M3P.
I got Redwood Motorsports "Performance Sport" Öhlins DFV based coilovers, along with Mountain Pass Performance Front Lower Control Arm Bearings to further tighten up the steering. Car handles amazing now, even better than the P2P, thanks to the M3P's lower weight, quicker steering, and configurable "handling balance" in Track Mode (which basically affects the front:rear power bias in turns). P2P would still have the edge in ride quality and handling of very large bumps and dips though, thanks to its tall ride height. I kept my M3P at its stock height (about 2-3mm lower after settling), so I didn't lose compression travel, but I might raise it to M3LR height at some point. (I feel like I actually
gained extension travel with the Redwood coilovers, but I didn't take comparison measurements with the springs off, it's just what I feel when angling over steep ramps and such.)
Also my wife was 100% on board with downsizing from the M3P's silly fragile wheel setup to something more practical. I went for forged 18" wheels and they've been great for real world driving, including nasty city and rural roads, long dirt and gravel driveways, etc. P2P comes with forged wheels from the factory, with more tire sidewall than stock M3P setup, P2P is definitely a better setup from the factory.
There's still many things I liked more about the P2P (hatchback/fastback, back seats, front seats, side mirrors, Google Maps, ACC following behavior, interior and chassis felt more solid, Öhlins DFV + forged wheels from the factory), but overall our M3P is better for us now (range, Superchargers, audio system, in-cabin storage, quick steering ratio, Track Mode, handling after the upgrades, heat pump, keep climate on / dog / camp modes, much closer servicing to our home, and Tesla's phone-as-a-key + NFC cards arrangement great, way better than using fobs as the backup like Polestar).