Cincinnati, OH
All about style. Stern's SW art is generic-- as others have pointed out, it'd look just as good on a lunchbox. Pinball art should look like it was made specifically for the game it's used on. Good example is Earthshaker - the shot lanes are represented as broken roads or chasms, bonus lamps as crumbling buildings... there are well-defined layers separating the playfield elements, playfield features like the drop targets are incorporated into the art (as a roadside billboard), and there are "extra" bits like the sun in the middle, which is used only for lamp effects.
Compare the creativity to Star Wars, which is generic art slapped together with a bunch of random inserts.
