I am wondering what the differences between these systems, they look exactly the same and I know the obi300 doesn't support google voice. Also i think the obi300 is for commercial use as in companies give these out for people who get voip service, since its not directly on obihai's website. I just think they are just the same device but the obi300 is for companies that provide voip to people. Other than what i said, are they any other differences between them?