Is there a difference?
When we collude, is that when we want to fix results as we have no confidence as to outcome? Could this divert focus from fixing our weaknesses; increasing our skills sets etc.?
Do we not cooperate when we want results; to achieve outcomes? Cooperation is a joining of forces, looking at synergies. It's about building something.
It's about perspective isnt it? We collude when we see the cup half empty and cooperate when we see the cup the half full. You need confidence before you can cooperate.