They're special edition cars to celebrate the age of the GTI so why not really.
If every 5 years they release a special edition they're not going to be particularly special
i'd only buy the special model, if i had a mk7 it would be a stop gap to a 40, whilst they cost more they tend to have better residuals and get rid of the pants stock wheels
in terms of sales, there were 2,300 mk5 Ed30s (and not the 1,500 original intended), 220 mk5 Pirellis and just under 700 Mk6 35s