It's a AAA title with the latest generation CryEngine. It's been in development for less than four years. GTA V was in development for longer than that.
I think the difference is that when rockstar make a game they plan out in advance whats going to be available, then work on it giving customers access to previews and beta's when its 6 months out form release.
With Star Citizen they've given access pretty much as soon as they had a working environment for the player to spawn into, and have built most of the game from there with new content being touted a lot. I'm not saying its a better or worse way to present the game but I think its a little underwhelming at this point...not to say it will be by the time I play it again.
Its one of those things I've put money into, and I wont look again until it gets to at least beta stage, maybe even launch...I do tend to put myself off games if I play the beta's, so I'll most likely wait.
Its looks pretty though...I'm still looking forward to playing it.