They don’t necessarily look the same. The distinction is typographic, and only indirectly semantic.
Figure dash is defined to have the same width as a digit (for use in tabular output). Minus sign is defined to have the same width and vertical position as the plus sign. They may all three differ for typographic reasons.
Figure dash is defined to have the same width as a digit (for use in tabular output). Minus sign is defined to have the same width and vertical position as the plus sign. They may all three differ for typographic reasons.