I don't want to sound as though I'm from mtbr, but the problem with changing the colour is that you can lose more than you gain. For example, if you're considering painting the Kula white, why not just put the Kula decals on the AA instead? Nobody would know the difference and nobody's going to think a white bike with grey pseudo-97 Kula decals is a genuine Kula anyway, even if it is one. Thinking of it in terms of market value, I'm pretty sure that a frame in the authentic colour with authentic decals will be worth around twice as much as a one-off, and not without good reason IMHO. Plus the Kula is superb as it is.
I can kind of see your point, apart from the fact that the two frames are a million miles apart in the way they are constructed. There are plenty of details on the kula that would indentify it as a 97 kula, even if it was a different colour.. but you know that better then anyone.
For me the value of it doesn't matter, I'm building a bike for me, and if I sell it at a later date it will be worth what its worth. In the mean time I am going to as much trouble as possible to finish it to as high a standard as possible. Either way it should look good, or at least the way i want it to.
Still, I'm tempted to keep it red, because you are right, it does look good..
Plenty of Oranges in the shed..