Hi, i have a S60 B5 AWD MY23 Polestar mode changes the moment of shifting, later shift up, earlier shift downs, gas pedal curve seems to change too. Not sure i changes to not shift in curves, have not tested this enough, i mostly drive within the city where this drive mode doesn't make much sense exept fun and gas burning 
Volvo S60 B5 AWD Ultimate dark MY23:
- Rear window/Trunk lid spoiler
- 85% tinted rear windows from the B-pillar, third brake light
- chrome grille slats wrapped in black
- Blacked-out Volvo badge on the trunk
- “S60”, “B5”, and “AWD” badges already removed