I chose one without the packs as I wanted the suspension to be more comfortable and less stiff, coming from a Type-R with stiff coilovers.
I also wanted the smaller spoiler, but that comes from someone that does not like spoilers at all (I completely removed the spoiler from my Accord Type-R).
It is completely wrong to imply that the 182 without the cup packs is comparable to the 172. Read the following from the review of the 182:
"Compared to the 172, the wheelbase has been lengthened by 13mm, the track widened by 12mm and springs, dampers and rear anti-roll bar have been stiffened to improve the car's already prodigious ability to scoot around corners.
The modifications to the engine include a new exhaust manifold and recalibration of the fuel injectors.
The new system now has two exhausts appearing from the rear bumper in the middle, as in the Clio V6 and as the Renaultsport Megane's will. There are also small revisions to the front bumper but they are not immediately noticeable.
There are some improvements to the interior of the Clio, with a better stereo, perforated alcantara upholstery and some silvery seat belts."
Regarding the cup pack:
"There is also a Cup chassis upgrade which lowers the ride height further, stiffens the springs and has even stiffer-sidewalled tyres. It costs £200 and gets sw**ky anthracite-coloured wheels as well. "
So if you do not want the stiffer springs and lowering (or if you prefer coilovers) and the used car you find does not come with the original brand of tyres (many don't) then what you get from the cup pack is the colour of the wheels.
I agree though that for re-selling purposes it will probably be easier to sell ,so if you do not mind the stiffer ride then I would suggest getting one with the cup packs.