Here are my thoughts since my garage has a LR Y with the AB and a M3P.
The M3P, off the line, is faster than the MYP (and obviously faster than the MYLR with AB). Once at speed, though, the Performance versions don't have much, if any, advantage. This can be visible by looking at 30-70 times or any of the dyno chart comparisons. That being said, if you do drag racing or a lot of street races from a dig, the Performance is the way to go, if you're looking at the purchase decision solely based on acceleration. Personally, I don't do much drag racing any longer no do I roam the streets on a Friday or Saturday night looking to make a few muscle cars cry. In terms of acceleration for what I use it for (merging at highway speeds or passing), the MYLR with AB feels great, even compared to the M3P, and there's no advantage to the P while at speeds of 30+ mph. I wish the Dragy GPS would have a measurement for 30-70 or 30-100. All they have is 60-130 mph.