What is better Intel ethernet, Killer Ethernet or realtek Ethernet?

[ninja_neon]

This is for gaming use in a new rig. I know that the software on killer is better appartently but is it worth? MSI and Gigabyte offer Killer with their mobos.

 

[Lmah]

Intel has been proven to be better if I recall. I personally have killer built into my motherboard, I think it's a gimmic. Though the software is decent for prioritizing bandwidth usage per application, though it hasn't been updated much for Windows 8.1, the Windows 7 version was better which was released a few years back.