I suspect the steel's different, for one thing. Machetes tend to be made from thin, medium- to high-carbon stuff, like 1050 or 1075. That kind of steel isn't expensive. Grinding edge bevels on a stamped-out piece of thin steel wouldn't take much time or money, compared to grinding out a large blade that's made from much thicker stock.
Perhaps CS sees a chance to mark up their kukhris more than their machetes? Meaning that customers will pay more, so CS charges more.
Just my $.02
Regards,
Dirty Bob