I might be tempted to go the Grohmann route as no matter how much I try I still cannot seem to warm up to the hollow grind of the Buck. I now own 6 different versions of the 110, some with better steel, some with drop points, one with micarta so I have been trying to warm up to them..... My ideal 110 would be s30v drop point FLAT grind but I have yet to find one. I'm sure most would say my tastes aren't that modern that a Buck wouldn't hold a treasured place in my collection and I dearly want to hold them in high esteem as my Dad carried one for most of his older years but they keep falling short of perfect with me.
This is a bit of a hot button issue for me...
IMO, the issue isn't entirely about flat grind vs hollow grind. It's about how the grinds are executed. I can't tell from the picture if the Grohmann in question is flat or hollow but either way, it is not a full height grind and because of this, it will have a sharp, friction creating shoulder and IMO this is what literally drags when slicing. Two data points and a few observations...
One, I have a Buck 110 with a drop point SABER flat grind. It doesn't slice any better than a Buck hollow grind. The issue is the combination of the spine thickness and the sharp shoulder of the grind.
Two, I have a stock Buck 110 with a hollow grind and clip point that I've thinned and flattened on a course stone. It is still a hollow grind and there is still a discernible shoulder but the shoulder has been scrubbed down and rounded and the blade spine thinned a bit. It's a very good slicer now.
Observation 1: The stock 110 clip point gets noticeably thinner and flatter forward of the clip. The swedged false edge helps thin the spine at this portion. When using a stock 110, I find a slight shift in cutting technique to favor the front of the blade makes is a much better slicer.
Observation 2: I believe that Buck (and other companies) is pretty committed to sharp, clean looking grind lines as an aesthetic design element to make the blades look cool. Cool looking knives with drag inducing grind lines probably sell more than boring looking full flat ground blades which are so old fashioned looking. Perhaps if we ask enough (particularly in the Buck forum, which Buck monitors) Buck will respond?