No, I do not think that Spartacus is (good / better / interesting) than Game of Thrones.
I believe that Spartacus is a great movie and is a classic, but Game of Thrones is more (stupid / historic / unpleasant) and (realistic / awful / superficial) and will have a (smaller / ridiculous / stronger) fan base.
All Spartacus has on Game of Thrones is more (aliens / police / violence) and admittedly a historical background. And it’s more (unrealistic / fantastic / exciting) because it looks like a video game with its special effects and blood.
The characters in Game of Thrones are more (simple / complex / plain). The actors are better, the dialogue is better, the humour is better. It's impossible to say Spartacus is better.