Just got my N9 and to compare it to the Lumia 900, the N9 has better hardware (construction). Software wise, WP7 contacts and social integration are far superior to Meego, but I feel that if Nokia actually put some effort into Meego then it would have also been good. Both OSes have their quirks and limitations compared to other OSes but it isn't so bad. I'm waiting for WP8 for a fuller OS paired with Nokia's superior hardware before I'll judge if the Lumia line will be better than Meego.

Oh yea, the decision for Nokia to forego the stupid USB latch on the 900 was a smart move. The latch on the N9 seems so flimsy and not durable at all.

All in all, if you are not a heavy app user, I don't think you can go wrong with either devices.