WPMU Defender vs the Competition

Is there a (relatively) unbiased comparison of the protection level among Defender, WordFence, iThemes Security and Block Bad Queries?

BBQ Pro seems to have the best firewall, but WordFence has other features like malware scanning and reporting. I wish there was ONE plugin that offered the firewall of BBQ Pro but had the combined security features of the others (plus, it would be nice if it had the simple features that "Hide My WP" or "Hide My Site" have built-in).