Bruce and his players found themselves playing the supporting roles on a dramatic day at Eastlands on Saturday as Mark Hughes was sacked and replaced by the Italian within hours of guiding his side to a 4-3 victory over the Black Cats.
The former Manchester United defender was critical of the lack of time given to his one-time colleague at Old Trafford in the immediate aftermath of the game, and while he welcomed Mancini to English football, he has his concerns over the lack of opportunities for home-grown talent.
Bruce said: Now he (Mancini) is in the job, we would wish him good luck, that's for sure. We are all like that in this country, we wish everyone the best of luck.
"But I reiterate what I said at the weekend: if we are not careful, all the jobs seem to be going to foreign coaches.
"I can't see many English or British coaches working in their countries, working in Germany or Spain or Italy.
"But I do wish him all the best. He is a very, very nice man and a genuine man, and he was a fantastic player.
"I wish him the best of luck in the Premier League, and (Brian Kidd) too."
Mancini was bullish after he was unveiled at a press conference last night, setting his target for this season as a top-four finish and the title 12 months later.
Asked for his reaction, Bruce said with a smile: "Not bad - but if you have got £200m in January, you have got a chance."