Both hold Pungra certification and both are qualified to lead classes — the difference is in how they teach.
Instructor. Works from a fixed sequence — a set choreography or workout plan, decided in advance and delivered largely as planned. Adjustment for individual participants is limited; the sequence stays constant, and participants adapt to it. Instructors are typically earlier in their teaching journey: a few months to a few years of experience.
Coach. Works from a bank of moves and techniques rather than a script, assembling and re-assembling the session live in response to who's actually in the room. Pace, intensity, cueing, and even which moves get used shift depending on the class in front of them. Coaches typically have years to decades of teaching experience — the real-time judgment involved comes from having taught the same move to enough different bodies and skill levels that adapting on the fly becomes second nature.
Within CEAT, both roles can Cue and Escalate from a plan — it's Adapting and Transitioning fluidly, in the moment, that mark the shift from Instructor to Coach. Coach status is awarded automatically after four Instructor certification cycles (see "How does Pungra certification work, step by step?"); it isn't a separate exam, because it reflects time and consistency in the room more than a single assessable skill.