I see this is related to your other topic:
Dell XPS 15 SB OR Sager NP5160
http
/www.tomshardware.com/forum/66719-35-dell-sager-np5160
You did mention there what you would do with the notebook:
Usage: Computer Science, Computer Programming, or Computer Engineering
I think you got good advice in that topic. Especially the part about getting a higher resolution screen. Upgrading from 1366x768 to 1600x900 or 1920x1080 will help you be more productive that splitting hairs over with CPU is 'faster'.