But that's more aiming towards freelance type work, while it seems like this is more of for people to find full-time jobs.
As for this being different, I don't think it is supposed to be. But I guess we will find out once it actually launches.
The unfortunate thing is that all these add-on job board solutions don't really go any way towards fixing the problem.
With the greatest respect in the world; I don't see this being a lot different (though I would be overjoyed to be proven wrong! :)). Not for any other reason that it is not really GH's focus...
See; it would be really cool to see this integrated with GH proper. With payment mechanisms so you could write a spec, post an ad, get someone sign up, code the work and then collect the payment. That's the sort of job board you should do :)
For the "real world" there is a lot of work to do for programming jobs - most of the offerings work for big corps and mid/large startups. Smaller indie firms like the one I work for struggle to find good local talent and there is just no one catering for us. And that is a huge market (I know at least 10 firms with the same problem within about 5 miles of where I work - in a sleepy market town).