I think the only part of the IRO build kit/wheels that you'd find would be any better than what comes stock on the Kilo TT is the cog and maybe the rims. But, the Kilo wheelset is perfectly fine and will perform pretty much exactly like the IRO set.

People tend to think that purchasing parts separately guarantees they are of better quality. While this is true on some low low end geared bikes, because you can't even buy the ultra-cheap components they come with, on something like a fixed gear bike there isn't much to cut corners on unless it's coming with a 1 piece crank like the SE Draft. I've run the TruVativ Touro cranks that come on the Kilo (mine were from a Rush Hour) on two frames now, and been perfectly happy with them, no issues at all. The IRO/andel/kazane/whatever cranks are likely of similar quality. This same comparison applies to most stuff in that price range.

The Kilo TT comes with perfectly good stuff, there are much better components out there that are better, sure, but not new for the price range the IRO build kit falls under.