While I cannot answer your exact question regarding all the benefits of the 512 gr/sec measurement capabilities of the Axis, I do run the Axis on both of my cars, but I push the 86 GN much harder.
I can run anywhere from 18 psi (as low as my HD WG will go) to the max the turbo will give me (about 34 psi) on the same chip, I don't need it re-burnt for different boost levels. I still log with a wideband in PL but the chip does a very good job of measuring the air and adjusting fuel without adjusting the chip in a wide range of boost levels. Generally the chip is rich at its base setting so when I adjust boost I keep it at 0 and adjust from there to dial in my ARF exactly where I want it. In good quality cool air my 86 when the turbo is maxed out will hit 430 gr/sec, so I have not hit the 512 limit.
While I didn't answer your question, I am not exactly sure where the 512gr/sec measurement abilities comes into play here, but I am just giving my experience.
Its also worth mentioning that I cannot remember the last time I adjusted the chip, once I got it where I wanted it the chip does a very good job of adjusting for different air temps on its own.
Pro's
-Wide range of adjustability with different boost levels in the same chip.
-The chip does a very good job of adjusting for different air temperatures
-You do not lose your chip settings if you lose power to the ECU. The settings are a dial setting, not adjusted in the chip with the gas pedal.
Cons's
-You have to open the hood and open the Axis box to make adjustments rather than using the gas pedal from the comfort of the front seat.
-You will lose the ability to read air temperature in the SM and PL due to that wire being used to adjust spark within the chip and is tapped into when installing the Axis box.
-You need to also purchase the Axis Translator (the box) which also serves as a MAF translator.
