Marine rts are easier to put up!
You could practically skip reading this and just look at the title. With ingame insights and forum facts, I've realized that it's much more valuable to take down alien rts than to save your own.
Think about it. An alien has to go gorge first, and then put up the rt. That's already a pain, not to mention the fact that it costs 25 res (10 res for gorge + 15 for rt). Or if they're a permagorge, then that's a lot of time to wait for 15 res to roll in.
Whereas three marines can run to a res node, cap it very quickly, and then move on. They just have to get there and let the comm know. And they can defend themselves much better than gorges.
If you can't hold your rts, don't fight an uphill battle trying to save/rebuild them. Aliens are better at taking down rts than marines. Soon you'll be seeing fades everywhere.
Instead, take down alien rts. It's like trading a bishop for a rook in chess. They won't have res to get anything, whereas marines can still live off of one rt. No fades in lategame = aliens lose.
So give it a shot - both rambo marines and comms. It strikes a crushing blow to the alien's biggest weakness, their res system.
Thanks fatpower for the sig!