As to it's comparison to RR - I brought up the same question to a peer last week when we discussed the QuietAgent news. Closest comparison (based on memory, mind you) was more polish and a focus on Fortune companies. It's funny you'd bring it up since we spent 10 minutes laughing about ResumeRabbit jokes over lunch.
All kidding aside, I'm not sure that QA does the aggregation that RR does. Would seem more like it's own repository/resource at a glance. Also - I think somewhere in the process that the companies must visually communicate QA use.
I think we came up with ResumeRabbit as a push for job seekers versus QuietAgent as a pull for employers. (simplified a bit, I know.)
Not promoting QA - in fact I've never used it. Just hoping to share the news and get some feedback here on the claims and functionality.
Scary that a few of us may have made the same initial comparison, though. :-)…