At first glance, there is no visible difference between the 2012 and 2013 MacBook Air. They look the same, weigh the same and have the same screens, keyboard, trackpad and ports. But there are a lot of differences that you can’t see, but can experience. Both are slim and light. The 11-inch model weighs 2.38 pounds and the 13-inch model I’m testing weighs 2.96 pounds.
Battery life
The most important difference is battery life…