I think that the mosaic pin handled cults
are by far the most comfortable of them all. Regardless, of handle material.
THey are also the easiest to keep clean. I have used both and the tube flares end up with fat, blood, etc in them. THe rear one also ends up with your pinky sticking into it which is not as comfortable as a full contour that you get with the mosaic pins. THe pins are more than tough enough and are fully warantied by Busse so unless your batoning a lot of stuff you have no business batoning with a .125" thin slicer then you have nothing to worry about. I would say that I have a FBM LE with bent tube fasteners and the only thing it does is make the handles not match up 100% but is still fully functional.
THe rarest of all materials are the Mammouth tooth. THere was only three. Next would be giraffe bone. As you can see from above I only have one in the pic. THats cause I was sneaky. I never took pics of my giraffe bones cause they were my favorites
THe custom wood handles are some of the best Busse' you can own IMHO where the handle material is of little consequence due too its size, and the fact that its fully warrantied anyway.
THe best material to me is giraffe bone for toughness and traditional appearance. Its one of, if not, the toughest bones available.