Dunno about Preston.
If he has a vision, philosophy then has he articulated that in public? If not then all we have to go on is how he has set his teams up and his record against the top sides does speak volumes.
Fergie was a gambler, a striker, his view was we can outscore the opposition, it was positive first. Moyes has shown he is more tentative, negative to the point where he sets the tram.up to negate the opposition more than actually setting us up that works to our advantage, that's definitely the mentality of a manager happy to scrape a result rather than create a result through a positive team selection.
Now you are just rewriting history.
SAF was the greatest manager of all time and yes he would take a gamble when we were losing. But in big games and in Europe the team setup was, more often than not, cautious and defensive.