Two factors dominate the morphologies of these craters: material strength and gravity. The bowl-shaped morphology suggests that the topography is supported by the strength of the material, while the topography of the basin-shaped craters is overcome by gravitational forces and collapses toward flatness.
Material strength and gravity control the shapes of these craters. Bowl-like craters indicate support from material strength, while basin-shaped craters show topography that is overwhelmed by gravitational forces and flattens out.