* RMS is technically competent. ESR is technically clueless. * ESR is more charismatic. He manages to convince people he's important. RMS has on charisma. * ESR will do everything he can do undermine RMS. It's a way of building himself up. RMS will do whatever he believes will further free software. They're both often wrong. * RMS's writings from the late nineties are prophetic. ESR's writings from the same period are, in retrospect, idiotic. * RMS created the whole movement. ESR did little bits of damage to it.