Except that Gullit is rated very high by Gazzetto dello Sport, if anything an even more reputable publication than Guerin Sportivo. Schillaci, as far as I know, did not get high grades by anyone (edit: see now he's placed high in DBScalcio). Ultimately this is a subjective thing. Things are not getting easier when it later came out and it was proven Moggi was meddling in the ratings. Schillaci was thunderous in the World Cup, but compared to other top strikers not as outstanding in the league or going far (and being decisive) in Europe. I'm not claiming with certainty MvB was better, but he had at least a truly stellar game in the (then important) Intercontinental Cup that year (well, PDG and others thought that was the case). Despite two assists he was bad in the World Cup though.