I haven't been able to locate a proper tight race track/ autoX/ or even canyon carving comparison between a M3P vs. a PS2 with a Performance package. If you have one, please link it. Obviously this sort of comparison isn't about 0-60s or range.
That said this sort of track feel performance is as much about feedback and feel as it is lap times. For most people, the feel is much more important than outright speed.
I think paying $8K for a computer program and some cheap cast wheels that are worse than the base wheels, is a rip off personally. But I've spent my own money, thousands of dollars worth, to buy coil-overs, Forged wheels (I greatly dislike 21" wheels btw, it's just not a performance tire size), and Brembos. To me, as someone that has spent considerable time at the race track, and the canyons, these are important modifications. And as a $5K option, it's a good value.
Personally I like those sort of high end components, even if the base of the M3P is a faster platform. Of course those components on the faster starting platform is even better.