I've had/have 3 irrubesco so far, all in community tanks, one for about 5-6 years, one around 7 years and one for 2-3 years. Two were completely harmless to every other tank mate but livebearer fry. One has apparantly killed a weak Dermogenys and was eating Red cherry shrimps (but not enough to keep the population from wastly growing). Interestingly, they all very rarely ate snails of various kinds, though. Even fin nipping was not visible despite large finned ornamental guppies being with them most of the time.
I wouldn't call them good community fish, losses can occur, but you cannot compare C. irrubesco to red eyed Monotrete species such as turgidus or cochinchinensis, even C. lorteti, salivator and probably borneensis are much more problematic with regard to tankmates.
Give a man a fish, and he'll eat for a day. Give a fish a man, and he'll eat for weeks.