IMO itís not a pretty car and I own one. Itís not ugly though, and just like the E82 it looks better in person. If you take a side-by-side of the 3 and STI they are similar as most hatchbacks are. The subie roofline is very curved, a lot more so than say a GTI (actually prefer the GTI/A3 style). There are also a lot of angles on the subie, large flares, vents and scoops.
If you think they look similar then wait until the new MS3 comes out. The hood scoop on it looks just like the WRX.
The white STI above has the factory spoiler; itís the front lip that is aftermarket. Also about 3-4k of those mods are wheels and tires alone (advans arenít cheap).