The latter inspired an entire branch of football with his far-reaching influence, though — that influence, while intangible, exceeds even the likes of Ferguson or Messi — and must be worth something extra? For example, without Cruyff the player, Ajax wouldn't become the club it became and Michels probably wouldn't be as successful as he was, and that would have a domino effect on Gullit, van Basten, Neeskens as well. Without Cruyff the manager, Barcelona might not have lost their little-brother mentality that plagued the club through the early '80s, La Masia wouldn't be as distinguished (which would affect Messi, Xavi, Iniesta, et cetera), and probably no Guardiola in his current guise — which would considerably alter the landscape of modern football as totaalvoetbal and concepts of positiespel have permeated every sector of the game.
Would also disagree with the assertion that Zidane was the main reason France won the 1998 World Cup, as the key to the team was the impregnable defensive unit: conceded only 2 goals in the entire tournament including a long streak without conceding a single goal between the Round 1 match vs. Denmark and the Semi-final match vs. Croatia — definitely one of the absolute greatest defenses in football history. That being said, fair enough if you reckon Zidane has an edge over Cruyff as a player and manager — not trying to step on your toes!