User blog comment:Legionaire22/Cadian vs Catachan. Who. Is. Deadliest?!/@comment-25033299-20120103174029/@comment-10514705-20120103184806

I suppose... but any place with lots of flat: most Agri Worlds, Dead Worlds, Death Worlds (Desert Variety) etc. is the antithesis of the Catachan.

Also, think about the specialised role of the Cadian Karskin: they are elite Storm Troopers who would have been trained in the art of all kinds of warfare. They would be specifically trained to fight in the Urban sprawl as well (their main purpose is to protect Cadia... remember :3) and their reinforced armour would provide them with a superior advantage over flat expanses.