Which RAM is better? [2x(2x4GB)] or [(4x4GB)]

[AdarmisMaximus]

Corsair Vengeance CML8GX3M2A1600C9 8GB (2x4GB) DDR3 $65 (Getting 2 to make 16GB RAM)
Corsair Vengeance CMZ16GX3M4A1600C9 16GB (4x4GB) DDR3 $119

PC Specs. Please give reasoning as to why you think which RAM you think is better? Cheers

PC Specs.
MB: ASRock Z77 Extreme4
CPU: Intel Core i5 3570k
Case: BitFenix Shinobi with window
RAM: ????
GPU: Palit GeForce GTX 670 2GB
PSU: OCZ Technology ZT Series 650W Power Supply
HDD: Seagate Barracuda 1TB

 

[Dark Lord of Tech]

Corsair Vengeance CMZ16GX3M4A1600C9 16GB < nice heat spreaders cool looking otherwise spec looks the same

 

[AdarmisMaximus]

Corsair Vengeance CMZ16GX3M4A1600C9 16GB < nice heat spreaders cool looking otherwise spec looks the same

Would having less RAM sticks plugged into the motherboard make a difference? e.g 4x4GB

 

[Dark Lord of Tech]

The answer is no.