Difference between 33x12.50 and 32x11.50?

I currently have 33x12.50x15s bfg ko2s with 15x8 black pro comp steelies. I have a 2001 ext cab 4x4 2.7l 5-speed with 5100s all around and the front are set at 2.5. In the rear, i have a wheelersoffroad 1.5" aal. I am considering downsizing to 32x11.50x15 bfg ko2s because with the 33s, i have been experiencing rubbing even with the pinch weld mod and a considerable power loss (and i dont have the money for regearing). So, how much would the 32x11.50s reduce my rubbing? How much would they affect my power? And how much would they affect my ride and look? (i dont do any hardcore trails)
Here are some pics of how my truck currently sits

 

About an inch in circumference and an inch in width.

You asked the same question yesterday and got lots of responses, did you hope the answer would be different on Black Friday?

 

I'm trying to find out if it would actually fix my rubbing issue from someone who may have been through this situation. Also if it would give me any power back. And maybe a few pics of first gens with 32x11.50s on a 2.5/3" lift. All ive been seeing in 33s.

 

Running 32x11.5/r15 KO2's on Wheeler type B rim (15x8 w/ 4" backspacing) Truck has roughly 3" lift and have no rubbing issues even at full tuck. Not running spacers either. I was considering going to your size for my next set of tires but may not. 32's seem to be the happy medium for some.