Cooper Discover AT 4S 65 to 70's

Have a 2017 Sport with factory Toyo Open Country 30's. Going to replace with Cooper AT 4S. Pros and cons of going from 265/65/17 to 265/70/17. Seems like I saw a post on it, but can't find it now. The Cooper specks seem to say they will work on the same rims.
Thanks

 

https://www.sizemytires.com/explanation/265-70R17

 

Occasionally people have experienced rub on their mudflaps, but that seems to be rare with stock wheels. I think the bigger tire will actually correct your speedometer. Mine is slightly slow reading. It will make the truck push a slightly harder gear effectively. These trucks don't need that at all but I'm not sure what difference one inch of tire size will make in reality. I plan to try it when I wear mine out. I'm interested in first hand experience to see if the gear ratio is noticable