Agree. I would say that the greatest manager are all very subjective matters. If you ask Atletico fans, they might say Simeone, us Mourinho, Barca fans Guardiola, and so on. Other case if someone who want to compare manager in terms of how many trophy they have won, as it is divide by different competitive leagues, and so on, I wouldn't think we could have a 'fair' comparison for that. I think Simeone is great manager, but I will be convinced if he could do what he did at Atletico for other teams also, like Jose. But no doubt he is 'The Special One' for Atletico.