Similarities between substitutional alloy and interstitial alloy?

Both substitutional and interstitial alloys are types of solid solutions formed by combining two or more metals. In substitutional alloys, some of the host metal atoms are replaced by foreign atoms of similar size, while in interstitial alloys, smaller atoms occupy the spaces (interstices) between the host metal atoms. Both types of alloys can enhance properties such as strength, hardness, and corrosion resistance compared to their pure metal counterparts. Additionally, both types rely on the principles of atomic size and structure compatibility to achieve a homogenous mixture.