Are Eris and Pluto different on the inside?

Eris is the 2nd-largest of the dwarf planets. It’s slightly smaller than Pluto. Both are rocky worlds located far from our sun, in the deep freeze of the outer solar system … in the Kuiper Belt out past Neptune. So you might assume the two little worlds are similar, both inside and on the surface. And there are outer similarities. But researchers at the University of California Santa Cruz said on November 15, 2023, that Eris and Pluto are likely …