The difference between higher demigods and lesser demigods is significant. It's fair to say the two have no real chance of confrontation, which is entirely determined by laws. High-level laws can fully suppress ordinary laws. Even if you use quantity to compensate, it only delays the inevitable; ultimately, the world projection formed by high-level laws will crush the world projection formed by ordinary laws.
But it's different for two world projections formed by high-level laws. Even if the initial use of a second world projection doubles the world power, the quality of the two is the same. They may compress but won't be crushed, and as long as a world projection exists, the world power from the opposing world projection cannot affect the other, essentially canceling each other out, leaving both sides to purely contend with their own strength.
