The point of likeness is also divided according to whether it is within the compared natures or a property outside those natures. In the first case the resemblance concerns an aspect of what the things are; in the second, things of different natures may share a quality.
Internal to the nature: A common kind, genus, or defining difference.
Outside the nature: A common colour, softness, beauty, or strength.
Do not conflate this with actual versus imagined. The earlier distinction concerns how participation is established; this one asks whether the shared feature belongs to the essence or is an additional attribute.