How is Pluto more like Quaoar and Sedna than it is like Neptune?

Answer: Because its terresterial, a dwarf planet and in the kuiper belt

Pluto is big enough to be considered a dwarf planet, but it has not been classified as such in some peoples views such as Quaoar and Sedna.

Explanation:

The both reach the otter layers of the solar system just like Pluto and are as I said above big but not big enough to be considered a dwarf planet