IIRC... On many MB products Sequencing (Either mechanical or electronic) prevents confliction. Divergence is often built into the airframe on seat installation. For the MB upgrade to Cessna A/T 37 historics in Oz, a guide device was retro-fitted to the cockpit structure to make sure the seat did not impact the cockpit canopy framework on exit and also ensured separation.
I know nothing about other manufactures but if its a Chinese seat it will probably have features remarkably like those made by MBA. If you know what I mean....