[jpablo]

On a computer click click is a lot slower since you have to come to a complete pointer stop in your release. If your pointer is still moving in the release square most interfaces would detect that as some attempt to start a drag

[retsibsi]

On Lichess, this isn't the case; if I set my movement preference to 'click two squares', a click on a piece is registered immediately on mousedown regardless of cursor movement.

(When I set my movement preference to 'either', it's a bit harder to test, but I think a brief click-and-drag always counts as a click provided the mouseup happens within the initial square.)