Starforge vs Space Engineers

[3Point5InchFlop]

Love the look of both these games. I've been doing some research and both seem to do what I want, so who's played them and what do you suggest is the better to pay for?
Both same price on Steam right now.

Space Engineers
http://store.steampowered.com/app/244850/

Starforge
http://store.steampowered.com/app/227680/