Yes, I specifically asked at order time from VW UK customer services. I asked them not to guess but to find out properly and they took 4 days to get back to me and were adamant that for the GTI / GTD, the Dynaudio package DOES come with a space saver spare wheel. I ordered my Dynaudio on that basis.
TBH, if it doesn't, It's not the end of the world as I'll just kick off with VW (as I have this in writing) and they can supply me with a space saver as I know for certain the sub fits perfectly into the 18" Space saver (as it's the same sub Audi use on the new A3, and that definitely comes with one).