What's the difference between time-lapse photography and slow motion on iPhone?

Time-lapse photography, in a sense, is the rapid release of video, which condenses a long time into a short period, making people feel the rapid passage of time.

Slow motion can be said to be prolonged for a period of time, so that we can observe details that we can't see at ordinary times, such as the slow release of a football landing, and we can see the extrusion deformation when the spherical surface touches the ground.