Which is the best topic sentence for a paragraph comparing and contrasting two types of butterflies?

The viceroy butterfly has a beautiful wing pattern made up of black lines and orange shapes.
So the next time you see an orange and black butterfly, it might be a viceroy, not a monarch.
The viceroy butterfly and the monarch butterfly look alike, but there are ways to them apart.
The monarch butterfly tastes terrible to predators, so they usually try to avoid eating it.