<p>Differences (Air vs Pro):</p>
<p>1.5 GHz dual core i5 vs 2.6 GHz dual core i5 CPU
4 gb vs 8 gb RAM
2.96 lbs vs 3.46 lbs
12 hours vs 9 hours battery life
1440x900 vs 2560x1600</p>
<p>Aside from screen resolution, differences are negligible for what you want it for. Get the cheaper one unless you really want the retina screen.</p>