I have BM's, Microtech, Gerber, Junglee, Dozier, and many cheapies but all-in-all I believe BM is the best value as far as quality and price is concerned.
Microtech, BM both uses 154cm on their knives but Microtech grinds their knives alot thinner, therefore cuts better, but when I put both BM's and Microtech's edges under a microscope, I find that they both fair the same as in edge holding and metal wear. And, under a microscope I see everything, believe me it varies from steel to steel.
When you are concerned about 154cm between BM and Microtech there is no difference, except for the way the blades are profiled which may let users feel that MT's are better cutters.
I also have a BM Nimravus in M2, believe me... stick with it, because 154cm is no comparison with M2, unless corrosion is your concern.