Mad Dog Ruulz! Ha, ha, haaaa!
Jeepers Ralf! I guess you
really didn't want to see this thread get started.
I actually think the Busse and the Mad Dog knives are both excellent. With Mad Dog knives you get the selective tempering which gives you a really wear resistant edge and a durable blade. I happen to think this is really cool, and they work well for me.
Busse has INFI, which I believe is uniformly heat treated. That can actually be an advantage if you are going to subject the knife to extreme lateral forces (aka prying) as it may result in a more uniformly durable blade.
INFI blades have performed very well in edge holding tests, but I find it very hard to draw a meaningful distinctions between between steels in terms of edge holding. All the good knife steels hold an edge a heck of a long time, and it is pretty hard to come up with a test that will conclusively prove one better than another. But certainly, INFI is a very premium knife steel.
So the main reason I prefer Mad Dog knives to Busse knives is design. I just like the ergonomics of the Mad Dogs. There is a little more model variety in the Mad Dog line as well. But they are both excellent blades. Pick the one that likes you the best.
I have to admit that I have never owned one, but the CS San Mei is a weird concept to me. It seems like CS is trying to make a silk purse out of a sow's ear. The idea of San Mei is to put a high hardness and wear resistant steel between two layers of tougher, less hardenable steel. CS stainless San Mei is three layers of AUS stainless steel, none of which are particularly standouts in the hardness or toughness department. Most likely AUS8 is more hardenable than AUS6, but is AUS6 any more tough than AUS8? I guess it depends on what you think toughness is, but in terms of how much a blade will flex before it bends or breaks, I don't know if AUS6 is any better than AUS8. I think you'd be better off with a uniform blade of 440C.
Daryl Meier makes a San Mei he calls Meierclad. I believe it is a 52100 core sandwhiched between layers of low alloy Damascus. Now that is San Mei.