The difference between rest and sleep for muscle growth??

Guys do any of you know if there is a huge difference between resting (lay in bed in the dark but not fully asleep) and full sleep?

I'm a shift worker and I try to sleep before my first night shift but some times I just lay for 2 hours and can't fall to sleep. I also don't get much sleep in the day but I try and stay in bed and rest even if I'm not asleep. Does your body still repair an grow the same when just resting as it does while asleep??

Thanks.

Not the same, even the lying position counts....