Hello all.
I know someone will ask about this, so just to pre-empt:
YES Network are re-releasing many of their box sets. And no, they are not different. The packaging is changing, but THE CONTENT IS NOT.
The repackaging is a simple matter of smaller cases means that more can fit onto shop shelves, and more easily.
For the record, the old casing generally consisted of the individual releases simply surrounded by a bit of card. The reissues are all discs in a single, thicker case. Sykes and George And The Dragon were released in the same single cases a number of years ago. The depth (spine width) is approximately 1.5x that of a standard, single DVD case.