Macbook Pro Retina 13 inch vs 15 inch?

I'm trying to decide between the Macbook Pro Retina 13" and 15". The Verge's review on the 13" macbook pro's performance, especially the graphics card, has caused me rethink my original plan to get a 13" Retina Macbook Pro. I plan on fully upgrading it, please take a look at the specs below:

Macbook Pro Retina 15"

Specifications

  • 2.6GHz Quad-core Intel Core i7, Turbo Boost up to 3.8GHz
  • 16GB 1600MHz DDR3L SDRAM
  • 1TB PCIe-based Flash Storage

Macbook Pro Retina 13"

Specifications

  • 2.8GHz Dual-core Intel Core i7, Turbo Boost up to 3.3GHz
  • 16GB 1600MHz DDR3L SDRAM
  • 1TB PCIe-based Flash Storage

I will mostly use it for work, email, web browsing, image processing, some video editing. Thoughts?