I just watched two videos on YouTube, one featuring the II and the other featuring the III. From what I saw it looks like they took everything that was useful from the II and removed it from the III. There's no more pull down type tables for your slate calls and GPS. The striker holders on the III are so deep that the user had a really difficult time removing them with ungloved hands. From the two videos I have seen the II is the better of the vests and the one I'll be getting.