I have a 20" Sirupati and a 20" Kobra. I'm a martial artist (of sorts), but I have ZERO experience with fighting with blades, and especially with Khukuris. Bando? I know it in name only.
That said, here are my quick opinions of each:
Sirupati- The first thing that struck me was the heft. This is one damned heavy knife. Sure, its not AK heavy, but it is still beefy. My original thought on its use as a cutting/slashing instrument would be that the ER staff would think the victim got nailed with a helicopter rotor.
Speed? It is remarkably quick and agile for its size, but it is not lightning fast in and of itself. With work and training and more muscular wrists, I have no doubt that this could be a frightingly fast way to deliver horrific chops to a foe...wounds that do as much damage from sheer impact and shock as from the cut.
Kobra- If you lay my sirupati and my kobra side by side, they look nearly identical. Same dimensions on every scale except for handle diameter (kobra is smaller, a plus) and blade thickness (again, the kobra is skinnier). So, I expected the kobra to be slightly faster in handling.
I was wrong.
The kobra is PHENOMINALLY faster. Comparing it with the sirupati makes it look like a horse race betwwen Secretariat and Elsie the Cow- and the sirupati is fast. Everything about the kobra is quick. And it is still thick/heavy enough to do heavy damage from just plain old blunt trauma. And if its that fast all by itself with no training on my part, I shudder to think what this thing could do in the hands of an expert.
My answer too would be to get both and see. If you're on a tight budget you could buy one, then buy the next and sell whichever you don't like- someone here will 'help' you out and take it off your hands, I'm sure.
Beware, though- you'll end up keeping both
If thats not an option, and if (as you seem to say) speed is king for you, then get the kobra.
mike
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"A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects." -Robert Heinlein