The NEU motors are far better quality and are more efficient, so should run cooler than the Losi motors. Note the size though, most people run a 1512 or 1515 in buggies. Go with the same (or nearest to) kV as you run now. That way you can feel the difference. Oh, and any sensorless motor will work with any sensorless ESC (unless you have an unsuitable ESC for the motor and application)
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