Macbook Pro 15" selecting cpu

can anyone suggest if it is worth opting for the 2.6Ghz over the 2.3Ghz CPU for the upper end 15" Macbook Pro. I primarily use Lightroom 5/ Capture One Pro 7/Photoshop CS6.

There difference is only 300mhz but is it going to be a massive difference when using applications mentioned above or just a mental one.