Tell the difference between an undershirt and Mormon garment top for MALES?

Mostly for the LDS, can you tell the difference between a male wearing a white undershirt under a dress shirt versus a male Mormon garment top under a dress shirt? Of course, this means the dress shirt would need to be white or a lighter color. I'm referring to being able to tell the difference when they're being worn, not just when they're sitting side by side.