best picture

how does the academy pick the best picture of the year? how are movies that are so different compared to each other? juno made me laugh and cry. atonement was spectacular - i love how the story was told from different perspectives and i have always loved historical fiction. so, how can you compare the two? how can you say that one is better than the other when they are both entertaining? we will see what the academy has to say. either way, i recommend both.