I liked Atlantis better than SG-1, and unfortunately for SG-1, Atlantis is becoming what SG-1 used to be. It was exciting, full of suspense and had the perfect balance between humor and drama. Last season, McKay was invincible. It's good, no, fantastic, that we're starting to see that these characters, too, are just humans, and make mistakes. The ending was awesome, I love that kind of drama. From what I have read, Dr. Beckett will also be screwing up. Atlantis fucking rocks.
As for SG-1, well, I can't remember a lot of it, so that's bad. I hated the comedic Goa'uld, hated Vala and the pacing sucked. It didn't build up any kind of suspense and the ending was meh. What's good, though, is that Vala's gone, Carter's back and the real SG-1 can now start exploring worlds again. I hope the writers have written an awesome season starting with episode 7, or else they will have ruined my favorite show. I'll gladly replace it with Atlantis, though.