Since we're going for retarded logic how's this: Christians are much more annoying than Atheists and here's why: Everyone knows Stupidity is a terrible thing. However, because we can not discriminate on the basis of stupidity, people that are stupid still manage to: get elected to office, go to school with your kids, sit on PTA boards, sit on entrance boards at colleges, hire you for jobs...etc.
Atheists have a valid reason for trying to "impose" their non beliefs on you. To save you, and subsequently themselves, from Stupidity. If you honestly believed in your heart, 100%, without a doubt, that if you didn't give your friends/family/co-workers, etc... information you had, that they would literally be stupid for all eternity, wouldn't you try and tell them? Of course you would.
So the difference is Atheists will help enrich your life (you know the one you're actually living right now, not some very improbable one you'll be living after your dead) and it will help the atheists themselves not have to further be surrounded for all eternity (errr at least what seems like eternity) by stupidity. 2 for the price of 1...I win!
/retarded logic.