I'm considering additional khukri - a villager, and in size range 15" - 18". I plan it for camping, and some generic "outdoor usage" whatever it might be 
But I'm not sure what size (and type) would be best? Is there significant difference in feel and performance between 15" and 18" khukri anyway?

But I'm not sure what size (and type) would be best? Is there significant difference in feel and performance between 15" and 18" khukri anyway?