We're choosing the Performance version, but you're right about the 0.2 second difference to 60 being inconsequential. We have never accessed the full power potential of the Model S Plaid we have, and we'll probably never set the Air up for maximum power. (Both the Tesla and the Lucid require going into launch mode and waiting out a significant battery conditioning period to access their full power.)
For me, the choice between the "P" and the "R" has to do with the power settings in the "Smooth" and the "Swift" modes, the two lower drive settings in which I will operate the car pretty much all the time. The "P" puts out 804 hp in those two modes, while the "R" drops the output to 670 hp in both modes. One of the traits that makes a car feel truly luxurious to me is a strong, instant surge of power when called upon for quick maneuvers at mid-speeds. I think the 134-hp difference will be useful to that end -- not hugely so, but noticeably so.
I'm assuming that at realistic interstate speeds, the Air will get maybe about 80% of its EPA-rated range, at best. (Our Plaid gets about 70% of its EPA range at steady 80 mph cruising on flat interstates in warm weather). That means the range difference (with the 21" wheels) of 30 miles between the "P" and the "R" will really be about 24 miles instead of the rated 30 miles. Just as the 0.2 seconds of acceleration is inconsequential, to me the 24 miles of extra highway range is inconsequential. I've never driven our Teslas anywhere near that little remaining range, and I don't expect to be doing so in the Air, either. On the other hand, I'm seldom running around locally where I don't want a few quick thrusts of seemingly-endless power.