EU is certainly the more complex game mechanically, probably closer to what CK gives you. Stellaris is starting to get there, especially with mods, but it still needs some good ol' Paradox iterating. What it is really good at though is role playing if you're at all into sci-fi themes. FWIW it's also my favorite soundtrack in years, maybe ever.
My man.
Stellaris, RimWorld, Doom...
What an incredible year for Soundtracks.