This should help people decide. Like last year, the i7 has a noticeable increase in the 11", less so in the 13".
They also have some comparisons to the Retina MacBook Pro.
http://www.macworld.com/article/1167418/ultimate_macbook_air_2012_models_put_to_the_test.html
They also have some comparisons to the Retina MacBook Pro.
http://www.macworld.com/article/1167418/ultimate_macbook_air_2012_models_put_to_the_test.html