differences between Clear Context and GTD outlook add-ins

[dcbahr]

so, I just started using the GTD add-in for Outlook 2010. But I also see that there's Clear Context. I downloaded that add-in and the only difference I can see, just in briefly looking at it, is that Clear Context has an inbox function. I was wondering what people think of the two and differences between them?Seems that CC has same functions but is more expensive. Just curious what people think.