I know people really seem to love their HI's but I too wonder just how they compare to the modern KLO's. It's cool to like the HI's for their tradition, or looks, or because they feed starving kids and all, but I don't see why they cannot be compared to other knives of similar design.
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Pick up an HI. I think you'll pretty quickly understand why people say there is just no comparison. It's kind of hard to really understand it until you have one in your hand. They're built like tanks, and yet they are handcrafted by a master smith, who has the accumulated knowledge of generations behind his smithing, and HI is made to very different specs than the low quality tourist knives that it sounds like you own and are comparing. It's very rare on most knives to have a spine thickness of a half inch. That's pretty close to being the norm on HI khuks. Add to that the fact that every khuk is a handcrafted custom by some very talented smiths, and yet costs generally under 200 dollars, and you may start to get the picture.
Other things to consider: I haven't heard of a single HI owner who wasn't happy with their purchase. Maybe Karda knows a few? But they really take care of their customers, their smiths, everyone. It's like a great big family. Great customer service, better warranty than most companies out there.
And, I've done a chop off between HI and the comparably priced Cold Steel offering. For all around general utility, I stick with HI. Sure, the CS khuks do pretty good at light tasks. Heck, so does the $50 Kabar KLO. But I might as well just get a $30 Condor machete instead, if that's all I care about. The fact that the HI's can come in a very close second in light work, and easily outperform most other competitors (even some hatchets and axes evidently, although I hear there are some machetes out there that are very good choppers) in heavy work, and have the edge in looks, feel, and durability, make this contest a no-brainer as far as I'm concerned. When you throw in things like pricing, customer service, and the fact that every khuk you buy helps support starving artists, as compared to a large corporation, it's small wonder that HI owners love their khuks.
Did I mention price? Because a BUSSE is going to cost you at least 500 dollars. I could buy 3 HI's for that price, maybe more if I strike lucky on the DOTD. The Cold Steel San Mai version is double the price. I can't think of anything else that would really be worthy competition.