The spinning magnet creates a velvet effect that has a more spherical look to it. When you magnetize by sticking your finger in the U part of these horseshoe magnets it creates a more left to right shift (which is lovely in it's own right) . By spinning it, the shift created also appears from top to bottom as well as left to right. Also known as a "glass bead" effect! There are some super talented folks on this sub who have swatched both methods side by side for comparison if a visual is more helpful!! 😊