I actually gave them a call this morning. He responded by saying they were not given details on what for done for a specific drive mode. His suspicion was that only shift mapping may have been revised for Tow mode. He mentioned that the specifics may be proprietary as to why those details were...
I have looked and can’t find a definitive answer if the FP tune alters tow mode in any way. If so what changes were made if known? For those that have this tune is a difference noticeable while in tow mode? I have been towing and am so far very pleased with the performance and tow mode of the RR.