Tinwacker
Do you consistently land with a crosswind from one particular side?
I am left footed and most often find that it is the "downwind" brake assembly is hotter on arrival at the gate in what I can only assume is the extra braking required on that side to prevent weathercocking in the landing roll.
Nothing to do with left or right "footedness" in my experience.
Of course, other factors like taxi technique and which direction the wind comes from in your taxi to the gate will also affect brake temp differential etc.