This is an issue that people overlook spending money on like putting their car on cheap tyres, this isn't aimed at anyone it's just my 2p!
Suspension is extreamly important dynamic of a car (no matter wheather its for looks of balls out handling) and getting it wrong will make your car unroadworthy, unstable & unpredicable which will also nulify your MOT and Insurance which then just adds you to that statistic of uninsured drivers in unroadworthy cars i.e. Scum of the road, not to mention damn horrible to drive and be driven in!
Getting it right on the other hand (which doesn't have to cost the earth just get a specifically designed FULL kit & make sure the geometry is spot on & your bushes & mounting points are in good nick) & spending on tyres will make you car a pleasure to drive making you take detours on the way home with a damn big grin on your face!
Finally, cheap kits are based around the more expensive Koni, KW etc kits that HAVE had thousands of miles of development then cheapo manufacturers buy these kits and copy the spring and damper rates as a benchmark for each model to produce their own, but obviously due to cheaper materials and manufacturing process they don't perform as well but will be right rates to keep the car balanced.
I to my peril put a cheap Jamex kit on my 205GTI when I was 17 and it nearly killed me on a few occations as it bounced the car all over the
shop and would unsettle the car mid corner (which you don't want in a 205 I can assure you) so will never do it again as my life is worth more that getting a few admiring glances in the high street!!
And answer to your question, Front is mixture of MK2 & 3 Golf & rear is Polo 6N