I agree with your fuel selection on the 6.2, if I were to go with it I’d run it with 91 since that’s the highest we even have in CA. I own zero equipment to tow so I don’t have that factor in my engine choice. I’ve driven both and you can for sure tell the difference but I’d only be getting the 6.2 for bragging right and less downshifting going uphill, faster acceleration, etc.