Fair point, I can't argue that "braking" doesn't appear once in your post. I just read "front scraping" and assumed pitch. Compression is a remarkably uncommon subject tbh as you tend to assume the car you buy has a spring stiffness sufficient to hold it off the ground!
If you could search "OEM items from ktec" and "value for money" then the forum would explode! We're somewhat fortunate to have Renault Wolverhampton on here as a trader. They are Renault's UK parts importer/distributor. New forum members often read "Renault," gloss over the "distributor" part and assume main dealer prices. Nope
Search Ktec, Ebay etc all you want but you simply will not get genuine parts cheaper than buying direct from Adam @ Renault Wolverhampton. You can find his contact details in the "trader" part of the forum, but as an example Cup Dampers are something like £36 from Adam or £70 from Ktec or a normal Renault Main Dealer. We also have Tom @ Wests Renault who
are a main dealer but give us forum discount. If you're local & prefer a personal touch you might not mind paying a few £ more vs Adam. OEM springs & dampers will do you very well (after all Renault spent £millions developing them). If you're feeling adventurous then Eibach Sport/Proline & Josh Cook "Cooksport" springs are a popular choice with standard, 182 cup or Koni/Spax (adjustable) dampers.
The springs should have two or three coloured dots halfway up. I can't for the life of me remember what colour a standard 182 spring should be though. Have a search. You'll have to take a wheel off, wipe the rubbish off of the spring and have a good look though.
You could compare the ride height (for the love of God please measure two points that won't vary between cars, e.g. from the floor to subframe and not from the tyre to the arch) but it's far from conclusive. A non sport spring might have a longer free length to match it's softer rate, yielding a near identical ride height.
Sorry for the overly-wordy reply.