Mark6 :
I know mad dog knives are extremely expensive
Only the large ones (10" blades and up), the mid sized blades are similar to the Busse ones in price.
how do they compare to Busse knives as far as quality, edge retention, strength, etc?
Regarding the blade, the steel is weaker, more fragile, rusts much faster, and not as wear resistant. This translates to functional differences in cutting ability, edge retention and overall durability.
McClung does use a tougher handle material and to be specific the grip on the TUSK I would prefer in most situations to the one on the Battle Mistress. The TUSK also has a dropped grip improving it in high impact work.
Note however that Busse Combat has modified the Battle Mistress making the grip more ergonomic and setting it at an angle to the blade. The new ones are coming out this year.
McClung's blades come with a high quality functional Kydex sheath. Busse blades used to have this as standard as well but are not switching to leather with Kydex as an option.
McClung uses a hard chrome coating on his blades. I have seen two versions of this. One that was not so good and one that was very scratch resistant. You basically had to hit the blade with a hard object to knock the coating off. He is using a different hard chrome coating that is supposed to be better than the one I liked. Busse Combat using a powder coat on the Basics which comes off rather easily and a ceramic coat on the regular INFI line which I have no experience with.
The only other relevant issue is that the warrenty on the Busse Blades covers any and all damage during knife work and it is not owner specific. The warrenty on McClung's blades is an "I'll replace it if I want to, and not if I don't.". It is also on you, the original owner, not the blade.
-Cliff