I'm not saying ALL SMIC's have low pressure drop...I definitely prefer Stillen over the others in this regard.
I'm also not saying ALL FMIC's are bad either...it depends on the core configuration. I think HKS probably makes the best FMIC because each turbo sees a large flow area, unlike UAS, Primespeed, Apollo, and Border...etc
I know you probably think I'm full of it, but so far my calculations closely correlate real world data