Bit of an ancient history question, but does anyone know what, if any, differences there are between the DSC 260 and DSC 260A speaker processors?

And are they by chance just rebranded dbx DriveRack 260s?

Online I have only found the manual—described as "preliminary"—for the DSC 260, nothing specific for the 260A.

https://www.jblpro.com/pub/electronics/260man.pdf

TIA,

Joel.