Difference.
These two little Bijou tiles both have the same tangle, Munchin. The first tile, in the upper left, was done by scattering dots on the tile and then drawing the tangle in the traditional way. I added shading at the convergence of the lines for each small triangle.
For the second tile, I started in the center of the tile with one triangle. Then, I added each new triangle, growing off of the existing ones.