Size is one. Surface ESC's don't worry about weight so much. A lot of surface vehicles still use brushed motors. Braking and reverse functions in surface esc's are of no use in aircraft. Cooling. Most surface controllers have built in fans or larger heat sinks, where aircraft have simple metal plates. Cars and trucks tend to draw high amps more often and need the extra cooing. I'm not real current in my knowledge of surface stuff. Maybe others can add more.
JD