Nah they share a lot, I dont know why you would say that. Carnatic music is much more streamlined as far as theory is concerned now though. Still, they operate on similar principles. Personally, I prefer hindustani music and hindustani performers, probably a bit of cultural bias at work there; more courtly/regal. I distrust western sources on indian music because often some of the greatest performers are just not engaged (language and exposure issues), and the ones that are do a lot of crap fusion-y and experimental stuff or are somewhat dishonest (fuck Ravi Shankar). It isnt difficult to understand or appreciate, a bit of experience is all that is required. Wikipedia is probably good enough to sort out any holes after that. Anyway, not the place for this stuff.
Currently listening to Insanity - Death after Death and Emperor - Wrath of the Tyrant. Love that last one, sometimes even more than ItNE. Someone needs to copy that shit, its so deliciously evil.