In the PL Ade scored 17 goals (incl. 5 penalties) in 2830 minutes, i.e. he was the main Spurs striker (1 goal per 166 minutes).
Dzeko scored 14 (0 penalties) in 1508 minutes on the pitch (1 goal per 108 minutes).
Uhm.
Ade did have more assists, though.
source: transfermarkt.de