IMHO, Factorio is aesthetically beautiful.
It’s just different games. Factorio is excellent as building production lines while Satisfactory is excellent as making feel you « in » your creations with 3D, a lot of architectural options, a really immersive sound design (quitting your noisy machine room to a corridor and hearing the sound go down when the door closes).
It’s different. But there is one important common thing with Factorio though : they are both made with a lot of love and with a lot of attention to every detail. In fact, both games could be an exemple of design and ergonomics for even professional softwares.