It's most similar to factorio imo, but has a bit more depth to it (though both have depth in different areas). There's a bit more emphasis on the 3rd dimension in the gameplay than factorio, and less than satisfactory. I think it threads the needle between the 2: more orderly than satisfactory, more chaotic than factorio.
One you convert a star system into a Dyson sphere, you gotta get FTL, there's MOAR STARS to sphere up.
My favorite thing to do was to make Faberge egg style spheres around my systems.
Also: mecha.
Of note: I played this some time ago, and there wasn't an adversary system in it yet. I see they have added one so, cool, but I don't have any opinions to add about it's quality and effects on gameplay. It was fun enough for me on "passive robot star farmer" mode, and remains one of the few games where I took a screenshot of how cool I thought something looked.