The first case is standard, using a stone. But when we cling to the edge of a cliff, we don't climb right away. First we let go of the edge, and then we climb again. This is how we knock down the slow climbing animation. In the second option, we do not use stone, which allows us to save some time. But this option is not easy and unstable. Therefore, I advise you to use this option only when there are no more places where you could save time)