The zilla's handle isn't well suited to a proper kukri swing. The LTC has more of a flare, so you can give it a good wrist snap, but as mag said it's not needed.

For the sake of fair comparisons, I used the same basic swing and grip on all the different knives. The LTC would chop even better if I used a kukri-style grip utilizing the butt. Even swung like a normal knife, it still bested everything else on the list.