You can't play 10,000 hours of Civ. At some point, the game become repetitive because the possibilities space is very limited. EU4, on the other hand, has pretty much unlimited possibilities. You can negotiate deals with neighboring countries, there are way more countries (whole world actually) than in Civ, you have a complicated Trade system that can make you money, a more sophisticated religion structure that you can use for your advantage...

Wait, I should stop playing these games.