I liked both but I still don't understand why we still compare GOT to Spartacus? i mean GOT is on The Wire, The Sopranos, Breaking Bad level and Spartacus ain't even on these level. Spartacus is on Banshee level. Let's be honest...there's a reason why people keep talking about GOT unlike Spartacus.
The story of Game of Thrones is much more intriguing and interesting than the story of Spartacus. Spartacus is packed with slow-motion action scenes like we see in most action movies epespecially "300". Both shows contains violence but Game of Thrones has violence when it fits the story. Spartacus just throws in violence like some sort of constant blood porn, even if it is fun to watch.
IMO, Spartacus is recommendable for people, who aren't interested in turning their brain on(like most of Bollywood movies).