In the corsair keyboards...

Can someone explain to me what's the difference between RGB and non RGB models ?

Like there's a K70 rgb and a K70. Besides the colors of the backlights, I don't have a damn clue what's the difference.

The answer is hidden in your post.

Aight heh :)

Rgb changed my life. Oh yeah get the Lux variations too I believe they are like a revision or version 2 of the k70s.

RGB is purely a looks thing, some people like to keep things consistent

If you like changing color themes then RGB is the way to go. Even new GPU's are not quiet RGB but allow you quiet a few colors to pick from. So if you want your setup to match then go with RGB.