color changing wheel cleaners

I've noticed people are starting to hop on the color change bandwagon. I know ironx is actually an iron remover (or so it says) and it seems to have the price with it. I just picked up since if the megs dub wheel cleaner (pretty cheap at advance) to try.

My question is this just simply a wheel cleaner with a color change or actually removing iron?

Also if you could chime in on others like sonax, etc, etc. Iron removers?

I have no idea why it posted it twice