Okay so it has come to that time of year where I am looking at upgrading from my late 2011 MPB 15" to either the 13" High end or the base model 15" retina. I am a photographer who travels a lot and works in desktop mode from when at home. I do do a bit of video too, so that is needed to power it all. I cannot for the life of me find any comparisons between these two online anywhere. Wondering if anyone could shed any light on the options and help me out.