The difference will be minor.  Quarter inch tops unless you are comparing a 14" wide tire on a 7" rim vs a 12" wide rim.  This has been beaten to death over and over but urban myths won't give up about it.

Never did answer what pressure you're running in your tires.

The corner/sidewall doesn't matter.  Think of the arc your front tires turn though.  Now move that out further away from the body yet still going under the body when turned (unless you run 0 or negative backspacing and the tires are completely out from under the vehicle by several inches) and you're just increasing the chances of the tires rubbing.

I had a '96 Tracker with 6" of lift and 31x10.5R15's on 15x7's with 2.5" of backspacing.  Deep dish wheels for sure.  My tires cleared the slightly notched fenders when turning and compressed only barely despite the stiff ass 6" Calmini lift and shorter/narrower tires.
How yours clears I have no clue.

I had a '96 Tracker with 6" of lift and 31x10.5R15's on 15x7's with 2.5" of backspacing.  Deep dish wheels for sure.  My tires cleared the slightly notched fenders when turning and compressed only barely despite the stiff ass 6" Calmini lift and shorter/narrower tires.
How yours clears I have no clue.
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we use our truck for offroad, we dont mind cutting fenders and remove inner fenders and such to fit, my friend has a 92 tracker with 35" tires on 10" wide rims with a 6" lift. i got 33" if i had a welder i would cut the floor in the fender well and back it up a 2" to avoid the rub. if i want to go extreme, i can add a 2" lift and cut the back quarter panel a 1/4" all around the fender well and i am sure 35" would fit.

33" without cutting or trimming is not posible for sure!