A new book charting Guardiola's unprecedented success, 'Pep's City: The making of a superteam,' reveals the two-man shortlist to replace Bravo in 2017.
"They both fitted the bill," sporting director Txiki Begiristain said.
"One was more expensive to buy, the other required a higher salary.
"I left it up to the coaches to choose."
Chief executive Ferran Soriano added: "(Ederson is) cheap at the price."