The double wheel spinning is different - that is ASR not the Q2.I am curious just how the stock E Diff does work in R mode? The reason I ask....I tried a burn out in a straight line on clean good surface when I first got the car and noted that it would light up both tires leaving equal length skid marks. If one wheel was first spinning, does that wheel get braked a bit and shift power to the other wheel or is it just chocked back. If that were the case I would think you would feel the actual power cut and it would be very obvious as a pause in acceleration or the car would not continue to burn rubber with both tires. I figure there must be a computer doing very fast transfer of power as needed as one wheel spins faster than the other...but in a very fast manner so each tire can maintain an equal speed to the other tire.
I don't know if the Giulia and Stelvio Quads use the same type of an E diff but do remember that a couple of early examples on those Quads had an issue of the E diff stopping working after some hot laps on track as it overheated. I wonder if that might be the case on the 4C for those tracking their cars mentioned at one point the inner tire would spin. The Wave Trac would be an answer but wondering if our E diff as is might negate the Wave Trac as it would work before the Wave Trac could engage and lock up as some others mentioned in posts above.
This is the description of the ASR system (title is on the bottom of the previous page of the manual):
And in RACE, this is disabled along with the ESC.
(Again, the title that this is what happens in RACE mode is on a previous page of the manual)