The steel, which is easy to miss because both are called Micarta and both cost the same. KS4020MCG uses D2 tool steel with a BlackWash finish and OD green Micarta. KS4020MIB uses 8Cr13MoV with a stonewash finish and brown Micarta. D2 holds an edge considerably longer.
This is the comparison worth reading carefully. D2 is a semi-stainless tool steel with high carbide content and very good edge retention for its tier. 8Cr13MoV is a value stainless that sharpens easily and holds an edge for less time.
Both handles are Micarta, so the name on the listing does not distinguish them. The steel does.
D2 means longer between sharpenings and a need to wipe the blade after wet work, plus diamond or ceramic abrasives when it does need attention. 8Cr13MoV means more frequent, much easier sharpening and better corrosion tolerance.
Neither is wrong. Choose by how you maintain knives.
OD green Micarta with a BlackWash blade, or brown Micarta with a stonewash blade. Both are 4.25 inches closed with a 3.25 inch blade, an extended tang and a pocket clip.
Both are closeouts. See do we restock closeouts.
Specifications above come from the manufacturer. Live prices and availability are in the strip below, pulled from the catalog at build time rather than typed into the copy, so they cannot go stale on this page.