Factorio steam early access started out better than current DSP though and things rarely improve much during early access development. DSP just feels slow and clunky in comparison, just placing down a belt takes forever early game, and later it gets faster but at that point you have blueprints in factorio making factorio still have a much smoother experience.
Also the random undetectable mini elevation changes messing up your building placements making you unable to load stuff from them to the nearby belt are really really annoying.
I like Dyson Sphere Program but factorio is vastly superior in regards of gameplay IMHO.