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Sony is really good at the sensor strategy, they really know how to Maximize the few special sensors they have.
The A99ii - 24MP or 42MP? They recycled the 42MP for this, to make a unique offering by helping its slow AF with dedicated AF sensor, and to unleash the sensor at its full 12 FPS speed. And people were very surprised when they saw this sensor was capable of 12FPS all along if only it had a buffer to assist it.
The A9 got the other sensor, and people were against surprised by the specs.
As result, Sony now have two lines of really strong Sports cameras. One with High resolution, and one with moderate resolution.
And they each made a huge positive splash in their launches.