spijun

I do not have time to look for each part, because there are thousands.
Of course there are some small differences,but anything significant
As you can see these are all the same parts

spijun

It is impossible due to coding and SVM (Softvare Version Management) which is adapted to your hardware.

There is a possibility but you must find the Audi hackers
I know two, but they in Europe OPSSSS I'm not that

spijun

Nothing is impossible, believe me

tomaszp72

It is exactly the same 3.0T engine across different models with a different tune. The same blower.

Go right away for Stage2 if you are going to tune it, stage1 is not worth it. Stage2 will give you pretty much SQ5 numbers.

If you are buying new it makes more sense to just go for the SQ5.

MP4.2+6.0

even if the motor internals all basically line up, my instinct is you will still run into issues, at least for the CEL coming on--which then means you can't pass smog. For example, I expect it would likely look at the various sensors and see a gear ratio issue (assuming SQ's are geared differently; common on Audi S models in general). That probably throws a CEL; car will mistakenly think there is a tranny issue since it would be looking for the wrong gear ratio. Of course if monitoring is solely in the TCU and not ECU, then maybe ok, but my prior experience is they are interlinked pretty tightly.

As spijun said in one of the other replies, I bet you would have to hack into the box to really get it right. And in the modern age, even if it bolts up or plugs in, often that simple CEL issue coming from one of the drivetrain monitored systems/sensors where something doesn't match up can be the show stopper.