Price, Video Length, and more.
The main differences between Person Detection and Cam Plus are the price for the service and the recorded video length when a person is detected.
Legacy Person Detection users will be able to pay what they want for person detection on 12-second event videos. This adds a ton of value, but nothing close to what you get with Cam Plus.
Cam Plus includes person detection, but also Complete Motion Capture, which removes the 12-second limit and 5-minute cooldown between recordings. It captures all motion and detects people while doing it in full-length videos. If that sounds like a better fit for you, sign up for Cam Plus here.