I recently did an edge retention test in cardboard and sisal, comparing the following:
Spyderco Para S30V
Buck AG Crosslock S30V
Buck mini-Ritter S30V
Dozier fixed blade, D2
BR North Star A2
Spyderco Military S90V
Queen gunstock D2
Fallkniven U2, SGPS
I carefully controlled for the different blade lengths, marking off the blades so that I was using the same edge length. I sharpened all of them to the same angle and sharpness (except the millie, the S90V would not strop easily on green compound to hairpopping sharp). I cut the same length of cardboard from the same box (extra large shipping box, cutting into thin strips) and cut the sisal rope the same number of times, all from the same coil. I measured sharpness using a crude device to determine the force needed to cut some thread. I was expecting good things from the U2, but in the end I was rather disappointed. The only knife in the bunch that performed worse than the U2 was the Queen. All the others were noticeably better. This was not the result I was expecting. YMMV, but that was my observation. Don't get me wrong, the U2 will do better than most knives on the market today, but in that particular group it wasn't the star by any stretch of the imagination.