This Harry and Ender are both terrified of becoming monsters. Both have a killer instinct. Both are much smarter than most of their peers. Ender's two sides are reflected in the monstrous Peter and the loving Valentine. The two sides of Potter-Evans-Verres are reflected in Draco and Hermione. The environments are of course very similar: both are in very abnormal boarding schools teaching them things regular kids don't learn.

Oh, and now the Defense Against the Dark Arts prof is going to start forming "armies" for practicing what is now called "Battle Magic" (like the Battle Room!).

And the last chapter's disclaimer?

The enemy's gate is Rowling.

If the parallels aren't intentional I'm going insane.