@Myles ******
you need to GO and get the hand out of the requirements for a year extension based on employment, it's not "basically the same as a tourist extension, it's a PILE of documents, tax statements, withholding paperwork, the list of share holders, the thaiz you employ and their salary withholding.
The reason many people get year-long, multi-entry Non-B's is that they're unable to meet the requirements inside the country to get a year extension at an immigration office BUT can meet the lesser requirements to get a year-multi-Non-B from a consulate :/