Linux project founder Linus Torvalds has slammed Apple's OS X for being "in some ways worse than Windows".

Torvalds was discussing Mac OS X Leopard, casting a judgement call on the debate between Windows and Mac.

"I don't think they're equally flawed - I think Leopard is a much better system," he said. "(But) OS X in some ways is actually worse than Windows to program for. Their file system is complete and utter crap, which is scary," he said, as reported by The Sydney Morning Herald.

Torvalds also slammed the way each new operating system is marketed as a big deal, saying: "An operating system should be completely invisible. To Microsoft and Apple it is a way to control the whole environment, to force people to upgrade their applications and hardware."

Naturally, Torvalds also talked up Linux, pointing to its push into mobile devices and Asus' popular ultra-portable, the affordable Eeee PC.