Based on my useless internet knowledge Bruno was responsible for these killings

Whispers DiTullio
Dominick Reds Caruso
Joey McGreal
2 approved for Caponigro I think
3 approved for Scarfo

I agree with you that Scarfo was in many ways a BETTER boss than Bruno but by no means less violent. Caponigro says Bruno nixed several killings. Kind of unheard of with Scarfo no?