Way late response here, but its nothing like Harry Potter. Absolutely nothing like Harry Potter. Both fall under a very broad definition of fantasy, but couldn't be further apart. They have as much in common as Wall-E and Alien have in common for both being science fiction. HP is a highly magical hidden "wizard world" that takes place in a real-Earth setting, primarily focused on and written for children and teenagers, with a generally light hearted tone and "fun" universe, despite the more serious elements of its plot. Magic is extremely common and dramatic, and the difference between our world and the "magic" world is one of the biggest draws to readers of the franchise. Very kid friendly until about half-way through the franchise, until it gets a little rougher, but still teen friendly. Game of Thrones is an intensely political, brutal story set in a medieval non-Earth setting, primarily written for adults (although it does feature a good number of children as protagonists). Magic and supernatural elements are rare, or even extinct, in the universe, and when you do encounter magical stuff, its a big deal. Its more or less a real world medieval universe with "a hint" of magic. The vast majority of the content is about people trying to survive in a cutt-throat, unforgiving and war-torn nation, and dealing with the scheming and political maneuvering of those in positions of power and how they take advantage of others for their purposes. Nearly every episode would rate as an "R" if it were in theaters due to the adult content. If there is one trait I've ALWAYS noticed about American Horror Story, its that every series focuses on people getting more and more screwed by fate. Its like a sadistic dream come true as people get tossed from the frying pan into the fire over and over again, and just when things couldn't get worse, you get thrown into an insane asylum or horribly disfigured or something. It may be "horror", but its very much drama.