To each their own though, i gave star mancer a chance solely because it fit my interests in space simulators, just the brutal lag and massive slow downs make it pretty painful to play and effectively kills the game for me, due to how in star mancer my units wont properly restock anything or just get stuck in a infinite loop of being douchy snobs and eating poop or just straight going crazy. I prefer Star haven personally as a kick starter backer, and the fact the game just has so many things you can do its nuts. Honestly both are in the same genre of space sim just ones less fleshed out and less stable. In space haven you normally catch on early on and its easier to pickup and start over much easier with out slow downs vs star mancer. not so much unless you set up some sorta backup system in place for the save system (based on save intervals) so you don't shoot yourself in the foot. At least with space haven you can roll back, with star mancer. Star Mancer is far less forgiving besides the bad lag, it also punishes you in a far worse manner than space haven. You'll just suffer and need to revert back a few saves before you burned up all your resources. Space Haven is more forgiving in a variety of methods as well as just as equally if not much more brutal if you have no idea what your doing, you'll suffer because you won't beable to jump out of system to really survive.

Space haven is better hands down, from the way the game handles basically, everything on the back end to randomization and story mode.

Starmancer early access