I had some tree work to do over the past weekend and took out 3 HI khukuris(all by Bura) to compare:
1) 18" GRS, 28.5 oz, at top of pic
2) 20" chiruwa AK(as far as I remember of the model), 32 oz at middle
3) 18" BDC, 31 oz, at bottom of pic
I had used the GRS previously on other chopping jobs. I use large gloves and the handle on the BDC felt more comfortable to me than on the GRS because of the longer length, which kept my little finger from sliding towards the butt cap and being crushed between it and the rest of my hand. Unfortunately, arthritis in that finger aggravates the problem.
As for chopping ability, the 20" Ak outclasses both the 18"ers - as would be expected. The next best chopper was the GRS which bit more deeply into the wood than the BDC even though the BDC was a few ounces more in weight. It may be that the edge geometry and more foward balance of the GRS makes it superior in this respect. The BDC balances more towards the handle due to it being chiruwa style - which I like. The 20" AK is also chiruwa style. Other than that the BDC in more "pointy" for those that like that feature.
I don"t feel the weight of any of these 3 is excessive and would tire me any more than an axe of similar weight would. I"ve chopped with a 26 oz. 17" villager on harder wood and then with the 18" GRS above and could tell that the little longer and heavier GRS was superior.
Yangdu, tell Bura his 20" chiruwa AK is excellent and we hope to see more.