Yeah I'm lost too. The Pro is almost twice the price of the original chip, and afaict the only difference is that it's a little smaller (and has no USB port).

Yeah I'm lost too. The Pro is almost twice the price of the original chip, and afaict the only difference is that it's a little smaller (and has no USB port). Huh? I've got a handful of the original CHIPs, and they're great for what they are. But I don't get this "Pro".