User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-5774152-20130114235455/@comment-5927468-20130115015352

It might depend on where they are. I mean if they're near or on the ocean, then Percy would have a clear advantage. He'd just draw strength from his father's kingdom. Otherwise I have no idea. It does seem like the two are basically equals.