News Intel's budget Core Ultra 200 series chips have smaller heat spreaders than higher-end models

My guess, the smaller IHS provides a better contact patch over the hot spots.

If anyone remembers how the Intel IHS for 12-14th gen was utterly garbage. It warped in the socket due to the retention mechanism, and even if you modified the retention mechanism it still had a slight concave patch over the hot spot and resulted in poor contact with a heatsink.
Noctua even went as far as offering an Intel specific convex contact plate.