Which Macbook Pro would you prefer if they cost the same?
The machine is used for photoshop and illustrator (no virtual machines).
rMBP 2013 - 16 gb ram, fastest i7 for 2013, Haswell, iris 5100
rMBP 2015 - 16 gb ram, slowest i 5 for 2015, Broadwell, iris 6100
rMBP 2015 - 8gb ram, fastest i7...