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Pretty similar in terms of honours. Both won 3 European cups as a player, and a stack of league titles. Cruyff won the European Cup as a manager, but Dalglish would have done as well if his teams had played in Europe.
Granted, Cruyff's tactics have had a more enduring legacy, but he owed a major debt himself to Rinus Michels.
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Dalglish didn't revolutionise his nation's approach to football. Nor did he have a discernible style that his team's played as a manager, unless you count constipated football.
At the time he played for Liverpool they were the most successful club in Europe, hence why all you melts support them, despite most of you never venturing within 50 miles of Anfield. So the unfashionable argument bears no scrutiny.
That and the lack of managerial honours. His brand of football as a manager was revolutionary only in the sense that it was turgid rubbish.