It could be the sharpening of the blades .
Ive been importing and ebaying them for a while , I get the factory to sharpen them for me ( Ragnar , if youre reading this , they will do it for you too if you ask , free , but you will still have to sharpen about 50% of them yourself )
Ive been noticing that the blades lately on the 907e knives have been coming with a finer finish , and a better taper , well a one more to my liking anyway ,its actualy pointy at the pointy end
I think they are pretty much still being made the way they were in 1910 or something , each knife varies from the next a bit in blade thickness and edge profile , color of the handle and the general finish
Ive been lucky enough to be dealing direct with the factory and they are great folk to deal with .
Its a bit of a shame that more people dont import and distribute a better variety of the knives Okapi make , in my humble opinion .