You are shooting your own feet with these links you know. According to your data Django had -ZERO- sql injections & code execution repots, now compare that to RoR which had 6 sql injections & 3 code execution reports since 2009. Even if you went by just the numbers RoR had way more vulnerabilities, now if you also take in consideration the kind of vulnerabilities i can tell you i feel way safer on django than RoR.

How many times did you have to stay up late at night to patch your framework ?