Keyword in URL vs organization

[cmp101]

I have a jobs site that currently has the following structure for jobs:

www.site.com/jobs/openings/1234.html

Categories used to be listed this way:

www.site.com/jobs/openings/accounting

But we changed it to:

www.site.com/jobs/category/accounting

Does it matter?  Is one better than the other?  The page title, heading, and description also have the word "openings" or "opening" in them.

[jesse-landry]

seems to me that the word "openings" would be googled more often than "categories"

...so yeah I'd prefer the other but I'd have to do a little keyword research to see what I wanted to lay that out as, personally.

[ditoroin]

Do not forget to 301 redirect old links

[evolvingSEO]

I also like "openings" in the URL, because as a user, if I were to land on that page or see that URL in the wild, I'd have a better idea of what the page is about.

-Dan