How did clay play differently? It was more specialised yeah, but I'd guess there were less big hitters and more fast runners right? Also I assume there's was more dead weight in average fast courters back then.Sampras at his peak on clay wasn't as bad as most people think. Especially considering how different clay was playing in his era. Only 1995 RG is a bad loss though.
Clay too, has seen an increase in the dominance of serving, which I blame on poly.