Interesting the sizes of those bodies are nearly the same.
Should bigger then Pluto be the standard for Planetary status?
Some folks question that they are actually planets; that they are more likely to be large, comet-like Kuiper Belt Objects (KBOs). That's part of the reason why a lot of people wanted to reclassify Pluton/Charon as a KBO.
I don't discount Dr. Brown's very thorough work. It's just going to take a bit more to sell me (and a lot of others).