Theres nearly a 13 year difference besides Drogba is a chelsea legend and is a bit part player. Man city got lampard and Chelsea replaced him with a younger Fabregas although Lampard did some damage to Chelsea.

http://www.dailymail.co.uk/sport/article-2878692/Manchester-City-seventh-oldest-squad-Europe-oldest-Premier-League.html
Man city 28.8 vs Man utd 25.4, only Newcastle have a younger squad so Man city 1st and Man utd 19th I believe in the league of oldest squads.

http://www.dailymail.co.uk/sport/football/article-2877485/Chelsea-active-international-list-78-3-cent-squad-playing-country-2014.html
Chelsea have most international players % from squad, Man utd have far less %. To be fair our players are to good for international level footy.

Man Utd: 26y 103d
Man City: 28y 283d
http://www1.skysports.com/football/news/15115/9739209/we-look-at-the-oldest-and-youngest-starting-xis-in-the-premier-league

Maybe they do I think they are in a position Man utd were in last season.