I've never tried Factorio, but I found Satisfactory very boring after a few hours. It was initially fun to do some exploring and make some initial manufacturing lines. However, when I realised that to scale up the manufacturing, then I would have to place all these components by hand hundreds of times, it just felt like boring make-work, and I never turned it on again. Maybe I would have continued if there was some way of automating the building, such as some sort of 2D viewer.