The older (original) fat jewel case edition of this was a 3 CD set. Scott in America has this one I think. Years later, a slimline hard back book edition was issued which has 4 Cds in it. I can't recall what the duplicatuion ratio is between the track listings but I know they were not identical by any means (obviously if there are 4 rather than 3 CDs worth in the second edition). I have a rip of the 3 x cd set somewhere and an actual copy of the book set. Good enough beat and pop but there are quite a few covers of English / US hit parade stuff along with the orgiinal material. The book set itself is a great looking item but is written only in Swedish so the potted band biogs it contains are lost on me alas.
You can still buy the book set edition from European sellers like Bear Family in Germany. The link below is the original Swedish seller's website where I bought it when it first came out and seems still to be available.