Macbook Air 2013 or older Macbook Pro

I am trying to decide between a macbook air 2013 13" computer which I would upgrade with 8gb of ram. Or a 13" w/e year macbook pro that also has 8gb of ram. From what I have seen in terms of performance the air mops the floor with the older pro.
What I will be using it for
Essay writing
Netflix
Some gaming (Dota 2 mostly)
Music

I have a nice 1tb hard drive that works well so I was thinking with an air I could use it to increase my storage space for non-crucial items.

I really want to know what other people think, is the air worth it? It will be around the same price. Is the performance that much better? Am I really going to notice the difference at all.

Mac

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