Hi pendrell. I already bought the set.
The Region 3 boxed set has exactly the same special features as the R1. In fact, the discs are the same ones sent to Regions 1-4:
However, what the R1 version includes is
a certificate with a code that allows you to download digital versions of all episodes of Season 3 on iTunes. We
don't get that certificate with the R3 version, sorry.