Differences: igneous rock is made out of magma metamorphic it change's it form
Similarities: They can both melt into magma.
Differences: metamorphic rock is bigger than igneous.
Similarities: They both can form in sediments.
Differences: Igneous rocks are found inside the earths crust or mantle,sedimentary rocks are found in water, and metamorphic rocks are found on earths surface.