iPad Air or iPad Mini with Retina Display?

For a while now, I have been pondering which I should actually purchase. I've done plenty of in-depth research on the two and have come up with two main concerns/factors:

  • As a photographer and artist, I enjoy color-accurate displays that can help me edit and manage my work; which the iPad Air has. Not to mention the larger 9.7" display as my work canvas.
  • I'm a busy person! I move around a lot considering school, work, and generally going away to hang out with my friends; I also enjoy reading books. All of these seem to work best with the iPad Mini.

I have no desire for an LTE model as I do already own an iPhone 5S (not to mention extra money needed to pay the data bill). I also already own a Nexus 7 (2013), made me really appreciate 7-8" screens. However, I am heavily invested into the Apple Ecosystem and have only made a handful of purchases in the Google Play Store. I know there are Google apps in the AppStore, but it's frustrating to switch between the two platforms.