Question on tunes within same category

[Jmunk]

I'm about to place my order but, I have some questions about the tunes within the same category. I'm curious about how much of a difference there is between the 65DD and the 80DD. I typically drive my truck very easy and I think I've only had the pedal on the floor once. If I drive the truck as I usually do (which is easy) would I notice a difference in the 80DD vs. the 65DD? I'm not sure that I should get both the 65DD and 80DD, don't want to waste a spot on the chip if their about the same. I have the same question about the 65 and 80 performance tunes. I'm not sure I would need the 100 performance tune unless someone can say that it gave better mpg over the rest. Lastly since I have auto I'm wondering the difference in shifting between the different tunes.