In my opinion, it'll mirror the human world, there is place for multiple different intelligent models. Each with their own slightly different strengths/personalities. I mean there are plenty of humans that can do the same task but at the upper tier, multiple smart humans working together are needed to solve problems as they bring something different to the table. I don't see why this won't be the case with super intelligence at the cutting edge. A little bit of randomness and slightly different point of view makes a difference. The exact same two models doesn't help as one would already have thought of what the other was thinking already