Speaking at UEFA's annual Elite Club Coaches Forum in Switzerland, the veteran Scotsman suggested Guardiola and Klopp's decision to challenge themselves away from their respective homelands proves the Premier League is the place to be.
"The Premier League is such a magnet for all the top coaches," Ferguson said.
"There's a school of Italian managers establishing in the Premier League but it's a collection of international managers now because I think the Premier League is probably the most attractive league in Europe now.
"When you see the television figures in America, for instance, it's all English football.
"It's such an attractive game, the English game, and that's why these managers are there, to take the challenge."