What is the difference betwwen trotter and pacer

Trotters move their legs diagonally, while a pacer will move their legs on the same side ie left fore goes forward with left hind in pacing. Trotting has left fore moving forward with right hind. Google images for more clarification
Pacers don't brake there trot. They trot very quickly and are trained not to canter. (This is what I have heard might not be completely accurate)
Join the fun and sign up to connect with our 200,000 members!