RoR has a for dummies book. Keep away from RoR. The article writer never claimed which one was better. I think Django is better just because it has no for dummies book.

On a side question for hacker news fellas: Who reads for dummies books? I mean who reads programming language books for dummies? Is there any practical use for them or is it just for people who don't know what they are doing but want to claim to know a language?