Does 20x12 -51 offsets wheels rubs with 6 inch lift and 35s?

I am finally lifting my truck next week. I already decided for 6 inch Pro Comp Suspension Lift and 35x12.5/R20 Toyo open country MT tires and also 20x12 size wheels. I am not sure if I have to go with -44 or -51. I want widest wheel without body mount cut. Little bit plastic trim or little rubbing is fine. Is anyone running -51 with that set up? Any suggestions or comments would be helpful.

 

I know -44 will be ok but not sure about -51

 

I kinda feel like there is not much difference between too. Both of these guys running same set up White is -44 and gray is -51. They almost looks same inch wider?