I strongly believe that the SWE LD's used the same source as the earlier JSC LD's except the Technidisc ANH pressing which seems to be sourced from the same IP as the DC/Faces/GOUT-transfer of the first film. It may however be variations between the various pressings of the sequels in the SWE set just like with the first film, but the Pioneer pressing I own of Empire seems to be from the same elements the JSC was sourced from.

Different cropping doesn't have to mean it's a different source.