Luckily, I have not had to use the SquareTrade warranty for my Kindle. However, my son covers all the electronics he purchases for his dept. with warranties from SquareTrade and has received nothing but excellent service. For that reason, I personally would go with SquareTrade.
I think this will cover the paperwhite but I'm on vacation and dont have it on me. But I believe why I got this on is it covered everything and I believe all the Kindle items. But if you contact them directly they will help you all your questions, they have excellent customer care!!