City are good enough Benni.
Player for player, City have a better team than United.
What is the problem then ?
City won the title but they are not a top team yet. It's only the big teams who perform season after season. In England Man Utd currently is the only club who succeeds to do that (5 years ago you had 3 clubs: Arsenal, UTd and Chelsea). Man City must take it step by step: first aim is compete every season and then win every season.
They had the normal decompression wich follwos after triumph. It can take 4 or 5 years before Man City area team that can compete every single season (and even then things can go wrong, other wise Man Utd would win eacht and every title).
City have proven enough this year that they are able to play some fantastic football.
The following players are among the best players in their postion: Kompany, Zabaleta (very underrated player), Yaya Touré, Silva, Aguëro, Dzeko, Tevez
Players like Hart, Clichy, Milner, Javi Garcia, Barry, Lescott are more than capable enough to play in a side that can compete for the title.
IMO Nastasic isn't good enough.
Nasri is the odd one out: very talented, but he has no brains at all. I would sell him for big money and buy a better, more consistent player... If i were Mansour, i would go on a hunt in Germany (Borrussia Dortmund).
PS: for football's sake, i hope City don't buy any Dortmund players...