Everybody is crazy about Star Citizen, but pound by pound, No Man's Sky impressed more.

Maybe because every time someone talk about Star Citizen they compare it with Wing Commander which I didn't play. Star Citizen also looks like a big commitment like EVE online which kinda scares me.

Of course, both game may be excellente, or both may suck hard... but if I had to pick one right now, I'd go with No Man's Sky. I simply enjoyed the videos more.

HOWEVER...

Star Citizen has bigger funding and look later on the development cycle. I expect Star Citizen to be released at least. No Man's Sky is on the "too early to tell" phase.