The difference is capitalism is bottom up. It has no top-downness, and would rather individual people and groups of people made agreements between themselves. That's why it can never usefully be described as a "world order".

That doesn't align well with efficiency or top-down world political agreements. But it has lifted more people out of poverty faster than any other system in history.

The absence of global coherence does not mean it cannot be described as a world order, it just means it's not optimizing for long term success. If we'd like to continue lifting people out of poverty and give future life a fighting chance, we ought to find a coherent system.