Given that the events involving the Kelvin may take place a decade or more prior to the events seen in "The Cage", and given the real-world tendency for uniform styles to undergo drastic change, often in non-linear fashion, over relatively short periods (let alone such changes seen in the Star Trek universe, such as the one from TMP to TWoK) the uniforms we see worn by Robau's crew could just as logically be completely different from the uniforms worn by Pike's crew as they could be closely similar.
I'm not seeing this as a huge deal, one way or the other, so long as they're not glaringly out of place like something belonging to a Star Wars or BSG universe.
A decade or more before The Cage? The Cage was more than a decade before TOS, and Kirk was 34 (+/-) in TOS. Doesn't really add up.
Though it's admittedly not an ironclad source, the EW article
gives the time of the attack on the Kelvin
(with George Kirk, Sr. aboard) as being "before Kirk is even born". Even giving EW
a reasonable margin for embroidery in the interest of selling magazines and ad-views, it seems in the ballpark to me.