They are both the same basic coil concept though one is a top coil design and the other is a bottom coil design.The T18 & T22 have restrictive airflow for mouth to lung hits and the coils are at the top. The Cleito has very wide open airflow for direct to lung hits and the coil is at the bottom. You could close the air on the Cleito if you wanted to to an MTL though. They are very different types of coils.