A Single?
 

If im right, there is a lot of different colors of the "A" CDs. What is the difference? DOes it care, wich one you buy, or do you just get a random one?

The normal edition is black.
Then you have Limited editions that are gold,orange,red,blue,green (this were random)
Then you you have a gold one that also has golden shiny Cover, that is the 1m sales press.
You can find the different colors here:
http://angel-ayu.de/angel-main/le.html

The tracklisting is a bit different on each. The black lists "monochrome / too late / Trauma / End roll"

I have the orange disk, and my tracklisting is "End roll / monochrome / too late / Trauma"

so each color have one song different ?

The songs are the same on every disk, just the arrangement is different. So the A-sides are the same, the remix's are the same, the instrumentals are the same, and the bonus remix's included are the same, but it would be arranged differently.

oh i see .thanks a lot for this information

Oh, I didn't know that too! thnx for the info!
I will try to search for gold one. =]