Any "real" khukuri is going to outchop a similarly-sized "Western" blade. Even the so-called "lightweight" khuks do incredible chopping work and are very stout. My only khuk at the moment is a GH Bhojpure with a 10 inch blade, and I've used it to cut seasoned 6 inch pine and Juniper logs, and split them as well.
What I mean by a real khukuri is one made the Nepalese way, with a horn or wooden handle, and a thick spine with a differential heat treat. With a knife like this, the handle has to "roll" in your hand to get the best results chopping, and the checkered rubber grips on Westernized "kukris" would tear your hands up quick if you waern't wearing gloves. Also, the thich spine of a Nepalese khuk makes for a great hammer. And, basically, I just prefer the looks and history of a genuine Nepalese khukuri med in a charcoal fire and tempered with a tea kettle. These blades have "soul".