[weiliddat]

Major difference is one you're watching something without interacting with it and the other is responding to your action; one you have your gaze relatively still, taking in the entire frame, the other your eyes are tracking an object as you interact with it via some sort of input device.

In tracking motion your eyes/brain can see improved motion resolution (how clear the details are in an object moving across the screen) up to 1000Hz.

[adastra22]

Your body & nervous system processing has input lags on the order of 100ms and variance on the order of 10’s of ms though.

[rogerrogerr]

But your eyes can track a moving object (like a car, or a ball, or a cursor or text on a scrolling webpage); they don’t stay 100ms behind it.