Don't think my answer will be any help ...
I had a performance MS initially. Took my mates out to the main road and did a launch. That was fun, and they were suitably impressed, but they'd all come round for a look-see within a couple of months.
After that I rarely used performance. Made no difference tootling along the motorway. If I had passengers and I jumped out onto a roundabout into a narrow gap between vehicles "because I could" any passenger who was not watching and paying attention found it very uncomfortable. So when I replaced it I got a bog standard one - 3.4s 0-60 (current model now 3.1s), not sure I actually need 2.4s (now 1.99s with Plaid) ...
I have only drive my own MSP; I've driven a number of loan-vehicles plain-MS and my replacement MS Raven LR. The MSP put the power down floorlessly. Never any drama. Even in the wet, at a roundabout with a "sharp-ish" left first exit onto sliproad ramp - "just floor it"
Can't say the same for the non-P. They all scrabble a bit. I've also not driven M3P, don't know if that is as well sorted as the MSP was. I don't know why the non-P MS isn't as good; perhaps the bigger motor doing "push" makes the difference?
My perception is that the P-boost is largely in the 0-30 range, so little improvement in overtaking range.
From memory the 0-60 spec for my MS Ravel LR is 3.4, the M3 LR 4.2s and the MY LR 4.8s. I have a 200M straight near here, with suitable Start / End markers. Approach at 40MPH on cruise and then floor-it at first marker:
The MS and M3 both get to exactly 90 and the MY to 86 (sadly I never did the test on my old MSP)
I haven't even bothered with acceleration upgrade on either the previous M3 nor the current MY
But that's just me of course.