The 18-year-old joined Paris Saint-Germain on loan with an obligation to buy in a year's time from Monaco on deadline day, but had previously been a target of Wenger's.
"For 90 per cent of players, their career depends on their choice of club. Kylian is part of the 10 per cent where any choice he makes will be a good one," he told French channel Telefoot.
"He [Mbappe] can be like Pele, there are no limits to his game," he added.
"We can already see the difference in the calls he makes [to receive the ball]. He scores but he also creates - only the very best players can do this."