I don't have either one but I just read that the Sony captures handwriting so it might be good for a student. I don't believe the Kindle does that.
Also, recently Amazon sold George Orwell ebooks for the Kindel that it turns out they didn't have the rights to so they remotely deleted the ebooks. They gave refunds to everyone involved but that is still creepy to me that they have that kind of power over the Kindle.
