bk7 in s30v. people like rowan more because they paid more.. that said I think both esee and becker are hugely overhyped basic carbon steels, awesome yes but with obvious downsides (not magic but yes great), edge retention and rust are ones. But a stainless version of any of the line would be sweet in the right steel, people who don't think theres a point to a stainless don't live in environments where it matters, also coatings are garbage.