Wow, never noticed that before, but you're right. I compared CD 1 from the collection to a CD-R and the CD-R is definitely more blue-green in color. As for the hub number, you're talking on the playing side? This is what's there: DIDX-1089923, IFPI L327, and a bar code.
Amazon is also reporting that the collection is:
#1 in CDs & Vinyl > Classic Rock
#14 in CDs & Vinyl > Rock
#24 in CDs & Vinyl > Pop
for whatever that's worth. I'm sure that's Amazon's own lists.