man, all you care is measurement? you hear with eyes or with your ears?
just value it based on what you hear. measurements are just complement to what you hear.
based on experience. there's no single UIEM that can match CIEM sq wise.
its because CIEM simply designed to allow deep insertion and full isolation. therefore better bass extension and treble extension. and that's also what i experienced from reshelling a UIEM into a CIEM.