The officers in this shot were recomposited in 2004 and again in 4K. The rank badge was also changed from black (either a black version used against blue screen or it became black by mistake) to blue.
While the other Star Destroyer main window frames were recomposited in 1997, this one wasn’t, so it was in 2004 and in 4K.
Two bogwings weren’t recomposited in 1997, but were for 2004 and again in 4K.
A better window was added to this 97SE shot for the 2011 Blu-ray that shows a reflection of the passing Cloud Car. This was redone slightly differently for the 4K.
Additional smoke and sparks were added to the furnace in Cloud City for the Blu-ray and again for the 4K.