The ten sets (for a total of 30 volumes) of the Carl Barks Library are the greatest homage the States ever did to a Disney comicbook artist.
Carl Barks was, IMHO, one of the greatest artists ever and the majority of his stories are masterpieces. The titanic project of the CBL pays tribute to his Disney legacy but, however, as all earthly things, is not perfect.
Many stories were in fact "retouched", "edited" or "censored" in various ways.
Here's an example.
"Bongo on the Congo" is a 1960 story, not available in his original form in the CBL release. Here you have an "hybrid": the color pages come from the original comicbook, the b/w ones from the CBL.