Vieira is yet to win since succeeding Roy Hodgson as Palace manager but has two points from three games and saw his side get their first goals during his tenure as they claimed a point at high-flying West Ham on Saturday.
De Boer was sacked after four defeats and no goals in four Premier League games in 2017, with Hodgson replacing him and bringing stability to south London.
Asked about comparisons between Vieira and De Boer, McArthur said: “I wouldn't compare them one bit, to be honest.
"I wouldn't like to speak about any other manager, but the manager now who has come in has brought a real energy, a real drive, a real winning mentality, the knowledge of football, an understanding of tactics and how to play everyone; it’s second to none.
"He obviously played at a top, top level and you can see that in the way he wants us to play.
"It’s been very high intensity in training - demands a lot from you. If we keep demanding that and keep working hard, we will be stronger on a Saturday.”
With a raft of experience leaving the club over the summer, McArthur - who has been wearing the captain's armband in the absence of Luka Milivojevic - has taken an even more senior role within the squad.
“That’s part of football; that’s the way it goes," said of the summer departures. "I have been around long enough to understand that. To see some friends leave, obviously, it was hard to see them go, but at the same time, it's a new chapter.
"We move on and we bring these younger lads in and try, as an experienced player, to help them grow and make the club stronger.”