I mean it better since the P3 should compete with the Model X both in size, class and price. The P4 is what would be in the segment of the Model Y.
As for holding up I’ve been in very early Polestar 2s that have been rental cars since then that were holding up very nicely so I think they would be better than the Teslas that use very poor plastic in some interior areas.
While still early, and I don;’t think pricing for Polestar’s new variants have been decided, I believe they will be significantly less pricy (at least the P3) to the tesla X….which, to be brutally honest, I have seen only one - ever. Base price for the X is about $120K….and there are many (better) SUV’s available at that price point. Certainly NOT popular where I live on the East Coast. Maybe in Ca they are? Don’t know? See lots of the 3 and S, and some Y, but virtually no X.