Its not so much the specs that are an issue, but how good the company is, the sturdiness of the laptop, the reliability, heat etc as the specs are so similar as ive built them .
Company - Large hardcore gaming company built by gamers for gamers
Sturdiness- mostly metal casings, using 3rd party (Like ASUS etc;) parts
Reliaility- I'd say about 95% successrate
Heat- They get pretty hot, but you're getting the fastest components at the highest OC's.
Comany- It's Dell, as much as you can expect from a large scale company
Sturdiness- Uses Dell OEM parts, plastic manufacturing, flashy lights (Woo!)
Reliability- OC's okay, but alot of stupid things like USB ports end up breaking, 80% success rate
Heat- quiet and cool, but not as high OC's.