The differences between a SoHo, SoFo and SoVo is summed up as such:
Small office, Home office (SoHo) units can be used as either offices or a home.
Small office, Flexible office (SoFo) units can be turned into an office, a home, or both. They are coined flexible offices because a selected number of their units have breaking points in the walls to enlarge the space.
Small office, Virtual office (SoVo) and SoFo are actually very similar in terms of layout. The main difference is that SoVos can only be used for commercial purposes.