If one bogey was 50% worn and the other was brand new would that affect temperatures?
I have a theory that the left bogey gets heavier use because most people drive manual gearboxes... the left foot is used to applying more pressure to activate the clutch than the right which works the accelerator and brake. So as mere humans when we apply our toes equally in our heads, our actual feet/muscles apply slightly differing pressures resulting in unequal temperatures. This difference would not be much but enough to give a temperature difference of a few tens of degrees. And it would be easily counteracted by a tiny amount of rudder input to keep the roll out straight.
Easy to check, next time you're driving, try braking with your left foot and see how delicate it is.
As I said... it's all in my head.
