Interesting topic.
I read a lot about Busse on internet forums and then talked to a few Busse owners. After this I finally decided to buy one.
What can I say? In truth, Busse knives are really great, but I would say most of it is metal. My knife does keep the edge quite well and then it sharpens to a shaving condition as if it is made of a soft metal. The metal thickness also gives confidence that the knife won't break in any situation. Just amazing!
This is great. However, ergonomics of the handle, blade thickness and weight... Maarttini IMO will be much more convenient than Busse for carving or food preparation.
I heart many times that Swamp Rat knives have better handles and are lighter than Busse, so Swamp Rat some real advantages over Busse. But it is difficult for me to imagine a real situation when Swamp Rat or Busse will make the difference, except artificial ones, like cutting roof of a car.
Busse is one of my best knives, but most of work I do using other knives for reasons I explained before.