Actually there's no "CD-only version" of "PERFECT BEST"…it comes w/ a DVD on top of the two albums, as sort of a bonus for the hardcore fans (like me, who owns it =P). It was probably Avex/RZ's ploy to get people to buy the ultimate collection…
http://www.ai-candy.com/ HANABI.1984
Oops! ^_^
I was confused by CDJapan's listing of a "Golden Version" with a different cover. My mistake.