The driver to be used would be the one in the download center.
But, if you are using an OEM solution, this could change since the recommendation is to download the driver from the manufacturer's website.
If you require any further information, feel free to contact us back.
I have this exact same question. I have an I7-4770k, and you are correct. The intel website says one thing, and yet their Driver Update Utility says another. I'm confused.
The recommended option to download drivers would be the website directly.
If you require any further information or support, feel free to contact us back.