Re: Marvel Readying 'Agent Carter' Series!
Agent Carter would be in a time period where SHIELD could track down Soviet spies, Hydra agents and (probably) Ex-Nazis. Basically regular humans, but bad guys. AOS would have a more far reaching premise of Superhumans, good or bad.
Agent Carter would more than likely try to track someone down like Notorious Nazi Josef Mengele while Agents of Shield would track down a human that has superpowers.