This has been messing with my head for a while.

The Cheela in/on Dragon's Egg book/planet, had their time move much faster, compared to the humans out in the space. This was explained as due to the extremely high gravity of their neutron star planet.

But in the Interstellar movie, when the expedition party land on the watery planet that's extremely close to a Black hole, their time is slowed down, compared to the human out in space.

I'm missing something simple here. Can someone help solve this for me please?