The original SRT oil was M1 0w-40 (a Euro oil).
They want the SRT oil changed every 6 months (which is nuts).
The SRT Hellcat engine uses a supercharger with its own oiling system (the engine oil isn't heated by the blower), where, let's say we consider the OP's engine, he indicated a twin turbo, which of course are lubricated by engine oil, so it is exposed to more heat there. The SRT oil isn't called for in any application with a pair of hairdryers and it's not part of the Chrysler spec.
The Porsche Cayenne Turbo (which, IIRC, the OP owns) is 500 to 570HP (Turbo S) depending on the year (2008+) from a 4.8L V8; 104 to 119HP/L.
The standard Hellcat at 707HP is 114HP/L, the Redeye 128.
The current Cayenne Turbo is a 4.0L V8 producing 541HP (135HP/L) while the Turbo GT extracts 631HP from the same 4.0L V8; 158HP/L.
So one must consider that Porsche is always pushing the envelope on power density and their approval process (which is extensive) reflects that, including testing that is turbo specific, and also simulated lapping of the Nurburgring.
I'd have no hesitation using an A40 lube in an SRT application (and in fact I do), but I wouldn't use the SRT oil in an A40 application.