The EdD qualifies you for a different range of employment options than other non-PhD doctoral degrees in my experience.
In some contexts it is considered a doctoral-equivalent, but many *teaching* jobs at post-secondary academic institutions I have seen explicitly DO NOT consider an EdD to be a PhD equivalent.
The pedagogical structure of EdD programs is similar to other doctoral degrees, but what academic employers are often looking for is subject area expertise *and* some training in effective education.
There is a program called the Doctor of Arts that used to be more common. http://en.wikipedia.org/wiki/Doctor_of_Arts It combines a research component with a decent amount (~25% of credit hours) of educational preparation. The NSF considers both the EdD and DA to be PhD equivalent, officially.
In practice, the EdD is looked down upon in the science and science-education realm. The parent is clearly aware of that prejudice. The lack of subject area knowledge outside of education is a real problem. In my experience, this prejudice is not unwarranted although it does get a bit unfair sometimes.
I did a PhD in a biology department that offered a DA option and was located next door to an education department. I got to see the job searches, the seminars and interact with the students in both programs. DA degree seekers got multiple academic job offers in universities, colleges and elite private high schools. The EdD grads I know struggled to get noticed. Most found jobs as corporate trainers or high school teachers.
I've personally seen lessons on introductory biology produced by EdDs and those produced by DAs. This is a personal assessment, but the DAs did better jobs.
Even though both teachers understood the basic subject matter, the actual experience of the DA student with research *in the subject area* came through during student interactions. Both lectures were similar in didactic quality.
A curious student can ask very insightful questions that only subject matter experience will prepare a teacher to answer. If a student asks a probing question that reveals the shallowness of the instructors knowledge, you have lost them for the year.
An EdD imparts useful skills, don't get me wrong. EdD's get jobs, good ones where they make real contributions. It's a matter of context. We need a few specialists in education as a subject in our universities. A few. Fewer than we have, to be more pointed.
We need more people in our universities who understand some of what education specialists know. This is an optimization problem, not structural problem.
Outside of post-secondary ed? I'm out of my element there. YMMV, but that's the view from where I sit.