The Manchester United midfielder had some interesting observations on the differences between the two managers.
Manchester United's Michael Carrick will have been disappointed to be sitting in the Sky Sports studio while his teammates took on Arsenal at Old Trafford on Sunday afternoon.
"He [Van Gaal] certainly has his own philosophy and seeing how he wants the team to play," Carrick told Sky Sports when asked on the major difference between the two.
"He’s a lot more calculated and measured with where he wants me to be and will sometimes have a word with me if I’m five metres from where I should be on the pitch."
Van Gaal has also helped the former Spurs man to approach the game less instinctively, and with more forethought.
"I think about my position and things like that a lot more within the game," added the 34-year-old. "Rather than playing on instincts."
It is clear that both managers are genuine winners, and among the top coaches their respective countries have ever produced.
Much is made of Ferguson's time at United, and rightly so with 13 Premier League titles, 5 FA Cups and 2 Champions League trophies, among others, but it is easy to forget that he performed miracles at leading Aberdeen to three league titles in his first high profile job, with the club's Uefa Cup Winners' Cup an unbelievable feat.
Van Gaal, of course, has been a success in three different footballing cultures - winning league titles in the Netherlands, Germany and Spain.
He is now trying to do it in a fourth country with United, and given Carrick's positive comments regarding the work the former Dutch national manager is implementing, you wouldn't put it past him doing it sooner rather than later.