Go with the BM. Gerber usually false advertises it's steel anyway. Most of their blades are "440 Surgical Stainless" because most people don't know there are different types of 440 steel, and the only useful kinds are 440C and 440V. But Gerber, mainly uses 440A which is terrible. Yes it may be "surgical stainless" because it is very corrosion resistant, but doesn't it hold an edge at all. But let's face it, scalpels need to cut skin, and that doesn't really dull a blade.
154CM is a good steel.