Everton manager Carlo Ancelotti says Manchester City have no 'clear identity'.
The two sides will face off in an FA Cup quarter-final this weekend.
Ancelotti told reporters: "I would like to talk about Manchester City. Manchester City are a fantastic team but they have no clear identity.
"Sometimes they build up with three, sometimes with two, sometimes their right back goes to play as a holding midfielder.
"They have clear principles. That is the difference.
"Sometimes they don't play with a centre-forward, they play with a No 10 as a centre-forward, so the identity of Manchester City is not clear. If they had a clear identity you would be more able to manage their shape, but the fact is they change their shape.
"What doesn't change is their principles of keeping the ball, having possession and to show the quality they have. The principles never change."