I would have thought
Pretty much the same until OEI then ooops!!
You also save weight by having a MGB that doesnt need to cope with a massive OEI single input requirement
The three engines also allow you to cruise with one shutdown for increased endurance/range. Difficult to do with only 2 donks
The Chinook benefits by having a 1960s structure, 1960s crashworthiness and no tail rotor (all the power goes to lift).
The MI-26 of course has two HONKING great engines (11400 SHP each) which kind of puts things into perspective!!
DM