Sure, but we can agree its stupid to compare.
Dzeko turns 30 next march, comming from a not so brilliant season, city wanted to free his wage and roma got him very cheap. He could have some decent seasons at roma, but he's not gonna get better anymore, and he's not a worldbeater. I take Morata and Mandzukic over him very quickly.
Isco is not even in his peak yet, a fan favorite (eventho he likes barcelona), and would be incredibly hard to get.