There are minor but noticeable differences between these two pressings.
Catalog number in the bottom left corner has been removed in the RCA pressing
Text has been added at the bottom left on RCA pressing
"Britney Spears Blackout" has been added on the spine of the RCA pressing
The Catalog number is slightly different on the RCA pressing. As well we can see RCA being added on the text at the bottom and the Zomba logos removed from the spine