The forward has struck four goals in his first two starts since re-joining the squad following his well-documented dispute.
City coped with his absence throughout his six-month exile, but a collective loss of form and crucial injuries saw City lose ground to Manchester United in the league, forcing Mancini to bring back the Argentine.
Asked about Tevez's absence, Mancini said: "Maybe there are some moments you have two strikers that maybe are not in form, but you have another two.
"This is the difference, it is clear - but we did everything in November and December to try to take Carlo here again.
"Without Carlos we scored a lot of goals, but it is normal if you have players like Carlos you can score more goals."
City face relegation-threatened Wolves tomorrow, with Tevez likely to be in the squad.