Which macbook pro retina to choose 13" or 15"?

Question

macbook

Good day.
I'm going to take a MacBook Pro Retina for programming. I choose from:

• 13" 8GB RAM, 256GB PCIe-based flash storage, Intel Iris Graphics 6100
  
• 15" 16GB RAM, 256GB PCIe-based flash storage, Intel Iris Pro Graphics
  

Also available for 15" Intel Iris Pro Graphics + AMD Radeon R9 M370X I'm doing
C++ programming.
Working in Unity + chrome 15+ tabs + (blender or Photoshop)
I'm leaning more towards 13, but I don't know if the same one is enough operatives for all this?
Is the Iris 6100 so good and is it enough alone?
Well, about the hard one, I think that 128 is still not enough, so I'm considering the 256 option.

Answer 1

I also used to lean towards 13" before - if possible - take 15 without talking.
In portability, the main thing is weight, not size. + a pound that gives a normal-sized monitor, core i7, a normal amount of RAM and a minimum size of SSD 256 fully justify themselves.

Answer 2

of memory, of course, more is better,
but you have more a question of showing off - they usually show off with a 13-inch one, though not Pro