Please remember to be respectful!
I certainly hope I don't have to say this as any more than just a quick friendly reminder, but please remember that even with all of our jokes about Code Review folks being crazy about readability and about them beating us to graduation and getting a design (ahem), they are all either human beings with feelings or bots that Jon Skeet made when he was bored, and we don't want to offend either.
Joking and playful "insults" is acceptable, but I think I can speak for the community when I say that we don't want this to be any more than a friendly competition. Even if we wish we graduated sooner despite having a better lifetime in beta or that we actually get a design, we're still friends with them after all.
I look forward to this competition. I think it will be a great idea and lots of fun, and we might even be able to get to know them better!
Treat them like you would treat our own community
We are two separate communities on two separate sites, but we're all a part of StackExchange. Just like you (hopefully) wouldn't break the rules or mess with other bots on our own intrasite KoTHs, "fight" cleanly and respectfully. We don't want another StackEggs incident, which also happened between the very same two sites.