I currently own the maxed out 13-inch MacBook Air from mid 2012 - and thinking of 'upgrading' to the 15-inch late 2013 rMBP (base model). I mainly use the machine for photoshop, illustrator and some light after effects - hooked up to a Thunderbolt display. Will there be any (noticable) difference in performance when using the above mentioned programs, if I were to switch to the 15-inch rMBP (base model)? I really love the the form factor of the Air. The retina screen is 'nice to have' but not that important to me the moment. What are your thoughts?