M14 r4 or m17r4

Hi guys,

I need your help to decide on which one is better

M14 is $900 with these specs (3 months old, under warranty)
•4th Gen Intel® CoreTM i7-4700MQ processor
•Microsoft Windows® 8
•14" WLED HD Anti-Glare Display
•8GB DDR3 SDRAM, 750GB HDD
•NVIDIA® GeForce® GTX 765M- 2GB GDDR5

M17 is $1,150
- Intel Core i7-3820QM
- 256GB Plextor M5 Pro (Primary) (this was an upgrade)
- 1 TB 5400 rpm HDD
- 32GB mSATA Cache
- 16GB 1600MHz DDR3 RAM(4x4GB)
- GTX 675M 2GB
- 120Hz LCD refresh rate (3D capable)
- Stealth Black with Soft Touch Finish

* Warranty already expired
* Comes with the original alienware sleeve, charger and cable, 3D glass but lost the cable.

Initially, i was thinking on the m17, but the m14 price caught my attention.

Any advice is much appreciated.