Equal. Alex Ferguson is the creator of Cristiano Ronaldo, Jose Mourinho upgraded Cristiano Ronaldo. Cristiano Ronaldo was equally god under both which proves they are equal.
Dude this is way too simplistic for my liking SAF experienced sustained success over a quarter of a century building many title winning teams He competed against arsene wenger and mourinho and came out on top(even though I believe mourinho had a better head to head record SAF won in style and he built a team that was the best team in the world 2007-2009 Manchester United who's reign at the top was cut of by peps Barcelona a team that is arguably the best club side of all time) Let's not forget SAF won 13 league titles which essentially means he averaged 1 league title every 2 years across a 25 year span which is absolutEly crazy)
Mourinho is undoubtedly a phenomenal manager but Fergie sustained it over a longer period of time and still kept winning. He also switched teams a lot and didnt have to rebuild ever really. Fergie had to rebuild his team several times over and still won. Mourinho has a long way to go before he can get to fergies level