I'm pretty excited about the Hulks & Horrors game and hope that it funds. One reasonable question gamers have, though, is why should I sign up for H&H when I can get Star Without Number for free?
The short answer is that H&H is really meant to take on the "dungeon crawl" theme and put into space, whereas SWN seems to take a broader approach. H&H creator John Berry addresses this here: link. He is also fielding any questions you might have at TheRPGsite forum here: link