a little like the dilemma with new face lift model vehicles. The older looking models are often favourably discounted, as the new face lift models hit the dealers lots. It doesn't take long though for the face lift models to penetrate markets and the 'old' style to start look outdated fast. Whilst it is not always the case, after a short period of time the new face lift model is not so new any more, since some other manufacturer hits the market with the next wizz bang product (market saturation). Products reach an equilibrium pretty quickly. From what I have read (the same posts as mentioned) and elsewhere, the 2013 seems much more than the sum of its parts, with the devil is the detail. Depending on the capital difference and personal circumstances, I'd spring for the new and improved 2013 (face lift) Burgy over a discounted 2012 or if money was a problem (which it isn't) I'd hold off the purchase. The restyle is what will separate that 2013 Burgy scoot, from the previous generations, and that's the difficulty, there's not really anything cosmetically different between say the 2002 (11 years old already) and the 2012 (1 year old) with the latter suffering because it looks well, old and outdated.
Give it a couple of years and the differences will be more apparent cosmetically as the maxi scoot markets matures even more, with the addition of other manufacturers e.g. BMW, Honda, Kymco myRoad et al. increasing their penetration. Even the BMW has made converts of quite a number (anecdotally at least). Riders who'd never contemplated a "scooter" before pony-ing up and securing a C600/C650GT and not even knowing that there are existing maxis like the Burgman or Silverwing, let alone the other - in existence.