I faced a Stegoceratops with my Stegoceratops today. Both same level. Both opened with slow down. Him first then me. I expected me to go first the second round but he went first again where he stunned me then hit me with stun strike which stunned me again yet left me with 20 hp. I got killed by him with a low stun. I always thought same level same species had the same speed so attack orders were traded between strikes.