The only player inside the top 30 that Sampras played in his Rome victory was Becker in the final. Hardly a feat.
If Roddick had played a full clay schedule throughout his pro career until the day he retired; he'd have at least one clay masters and a couple finals.
The fact is Roddick's junkballing is far more suited to clay than Sampras' flat high-risk game.
Not to mention that the level of the game has increased ten fold since the 90s, explaining Sampras' surprising success.
Whatever. People can excuse away the results all day, but at the end of the day all that remains are the results.