Certainly does. Day to day driving on road, is far more comfortable with the standard setup. Coilovers have a tendancy to cause a few common problems on all cars, not just alfas (some people may not notice them)
1. bouncing (particularly noticeable at high speeds over motorway dips onthe road)
2. Crashy as hell over potholes
3. Generally stiff - i.e. speed bumps, the reaction form coilovers hitting/coming off the bump is a lot firmer and quicker than the stadnard setup. To the extent where my missus actually wonders what is wrong with the car.
Coilovers are however, excellent for track use. And over the years ive tried several setups on several different cars, and coilovers are supreme on track, bilstein/eibach setup (although very good) doesnt come close for hard track cornering.
Dont get me wrong,there are lots of people that run coilovers and are happy with their road perforamnce/comfort, but personally i wouldnt recommend coilovers for the road if you want a comfortable ride and are not going to use your car on track. Your better suited to some lowering springs to boost the handling and keeping your standard shocks, IMO.