Defenitely don't agree Morata is alot better, considering latter has scored plenty of goals for years and Morata barely gets double digits a season in his short career. Diego Costa is very strong, quick and has similar skillset to Morata (not as good dribbling perhaps), but more importantly is a proven goalscorer that carries an attack. Not in NT but club level. Same Morata who is completely benched by Mandzukic who is defenitely the more limited player to Costa (was not able to properly replace Costa in Atletico) can't seriously be seen as alot better then Costa in overall.
In club level mainly, because I get why Costa lost his spot in NT. Tho he should still be called up.