I use CPUBOSS to compare CPUs. As to the GT70, I see NOTEBOOKCHECK has some reviews.
Bob
Hello everybody,
My last PC crashed a couple of days ago, not repairable....
I'm working a lot on it, online drives, SEO softwares, graphic design softs, DAW softwares, downloads..
I want something really REALLY powerfull for about 1400£ (1600euros)
I finally decided to choose MSI, the GT serie for their large and solid architectures as well as quality components.
Now I'm struggling between the GT70-2PE or 2QD with a i7-4810MQ and the GT72-2QD or 2PC with a i7-4710HQ... Any help? Any alternative?
Thanks!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic