I'm going to make a statement based on my observation which I hope does not turn into a controversy but as I'm a CPK fanboy, here it goes:
Note the high saber grind on the HDFK as opposed to the other two. I don't know the stock thickness of the other two, but assuming that the GSO and the HDFK will be more or less about the same thickness and the Busse traditionally a tad thicker, I can state with utmost certainty that the HDFK will prevail in cutting and slicing with its 20 dps factory edge. As for hacking and batoning, the Busse being the bigger and the heavier blade may win the day but I can not fathom that the HDFK will cr*p the bed sheets either! As for clean lines, just notice the smooth radial line (I forgot the name of it) of the HDFK and then the Busse as compared to the sharp drop off on the GSO.
So what am I saying? You tell me
but you ought to get one