The Moon should grant a little more protection than the ISS since you can shovel regolith on top. As far as the raw radiation environment, it's about the same,

The Moon should grant a little more protection than the ISS since you can shovel regolith on top. As far as the raw radiation environment, it's about the same, in both cases half the sky is covered by a large planetary body. The Earth's magnetic field gives no distinct advantage to radiation protection if you're already in a thin metal capsule.