Cup models do differ from models normal models with Cup packs fitted yes. The 172 Cup is around 80kg lighter and has a slightly shorter ratio box meaning it accelerates marginally quicker, however the 80kg saving comes at a price, no air con/leather seats/climate/xenons/headlight washers/cruise/abs/tc/leather wheel, it also has less sound deadening and thinner glass in it's windows.
A Cup packed 182 is what you have in that advert, it has all the nice toys that aren't included above, plus it has the better suspension setup offered by the Cup packs, and a nice spoiler and splitter.
Question is, do you want 0.1 second quicker to 60, or all the nice toys