I was interested to find out what are, if any, the differences in the 8 speed automatic transmission. I know it's used in the 2014+ RWD GS350 models, IS350 RWD, IS F, GS F and RC F. Are they all essentially the same Asin units? Are there software differences between F and non-F cars? I would imagine shift points might be different for the V8 motors. I was curious if the speed of the shifts is different as well.