The P drops the car a massive... 0.39 inches.
That's it.
No magnetorheological dampers, no adaptive suspension, no air ride, none of it....
Plus it comes with the boat anchor pot-hole-magnet heavy 20" rims too.
If you're all about high end chassis stuff in normal street use- get the LR AWD and put some of the $8000 you save toward aftermarket suspension parts like from MPP for example-
Suspension Archives | Mountain Pass Performance
And even though you don't care about 0-60 acceleration it'll still be quicker than most BMWs... or with the 2k Boost it'll be quicker than anything BMW currently makes/sells that doesn't say "M5" on it.
Now, if you plan to race the car on a (non drag) track- that's a different story... because you're really going to want track mode and that remains a P exclusive.... just plan to sell the 20s and get some light, forged, 18s instead.