yeah, no problem!
i have another comparison you can use as well, but this one is rather hard to tell w/o an explanation.
this (as a matter of fact) is a FAKE pressing of "RAINBOW" that my dad bought for me too (he has no eye for spotting real things and fake things at all ><). the image is slightly shifted so that ayu's head is cut off, the font color for the "RAINBOW" and "ayumi hamasaki" are too dark, and the font used for "ayumi hamasaki" is totally off. you can also sense the quality loss as the color contrast is a bit high.
now compare it to a real edition of "RAINBOW" i recently bought:
this is REAL. the cover is exactly the same as japanese ver. except for the certification stickers, CRSC logo at the bottom left, and the chinese tital above rainbow.