Function check_sameish_report 

pub fn check_sameish_report<'f, 'mem, T: Facet<'f>, U: Facet<'f>>(
    left: &'mem T,
    right: &'mem U,
) -> SameReport<'mem, 'f>

Check if two Facet values of different types are structurally the same, returning a detailed report.