Macbook Air 2013 to 2015 for $120?

Hey everyone,

We just added a refurbished mid 2013 Macbook Air ( 1.3ghz, 4G, 128GB Flash, total cost with tax $590) to our Apple collection.

My question, for $120 more I can get a refurbished 2015 Macbook Air ( 1.6ghz, 4G, 128 Flash.)

For a computer that will solely be used for internet and word processing on the road, is it worth the $120 to upgrade to the newer model? Initially, I only wanted to spend ≈ $500 for a secondary travel computer, but if a $120 more ( $790 total) can get me a better, newer computer, I'll be willing to spend a little more.

What are your thoughts?

Thank you!

M