Red Hat vs Debian Linux: overall security

I am evaluating the overall security of Red Hat linux vs Debian.  I've been told that Debian has many more vulnerabilities than Red Hat.  I've also been told that Red Hat is quicker to release security patches than Debian is for the "stable" release.  Can someone point me to a good overall assessment of the two?  Using this tool: www.securityfocus.com/bid  I see that Debian has 17 pages worth of issues but Red Hat has surprisingly few.  Am I misinterpreting the results from this tool?