Pep's teams always know when to be cynical and clever though, it's not always pure. Look at the amount of tactical fouls City make. I worry Ange is too pure and won't adapt.Pep to be fair has made some slight positionally adjustments (John Stones as a false midfielder) but as you say the principles are the same.
The way Pep plays is so extreme City give up scoring goals for it, the amount of times I have seen City win the ball back and get a 4 on 2 or 5 on 3 and rather than take the opportunity to score they simply slow the game down and go back to passing must be in the dozens by now.
No other team does this and gives away huge scoring opportunities. They believe in how they play that much they give up goals. One City player said a while back that Pep used to go mental in training if a player scored a goal but the goal was not scored in the right way, ie the player hit a difficult shot rather than pass to someone in an easier position to score.
Obviously you need the right players for this. Pep finished 3rd in his first season with a billion pound squad (probably £2bn in today’s money) and then had to spend another billion to make it work. Both Arteta and Klopp got huge backing. We have no idea if Ange will succeed but no manager will without good backing.