According to Tesla Tap VIN Decoder, the 8th digit of the VIN designates dual or single motor and whether it is Performance or not. 4 = Dual Motor Performance; 1 = Single motor ; 2 = dual motor (non performance); 3 = single motor Performance (old +) then A through P (not all used) represents some of the older 40/80/and 90 KW motor variants. There appears to be no specific VIN character for RAVEN per se.; EV-CPO may h Keep in mind VINs are issued/registered by the NHTSB in the US to comply with international standards to designate required vehicle information and don't necessarily go to the component level. However, it would seem Tesla knows the serial number start point since the RAVEN software is different for the motor type as well as the suspension change -- EV-CPO may also have determined the serial number cut over.. Ask your local store if they can tell from the vehicle serial number - they may not be willing to share serial number data, but will say whether a Model S is RAVEN or not. or whether any "S" were built with the suspension without the Model 3 front permanent mag motor is also something only Tesla may know by the serial number.
I will listen for the "whistle" when my RAVEN S arrives, I don't hear it in my RAVEN X.