What’s the diffrence between a ceramic pan and a non-stick pan?

The ceramic coating doesn’t contain PTFE (polytetrafluorethylene) -- it’s the component which provides non-sticking.

If there’s no PTFE in cookware’s coating, its non-stick properties will be lost quickly, and food certainly will stick during long-time usage.

That’s why it’s more correct to qualify ceramic cookware as easy-to-clean cookware.