There are some differences. DP-3T proposes two different systems, one with linkable tokens and the other without linkable tokens. The first system is similar to Apple-Google in the sense that your tokens for a day are derived from a key which is uploaded to a central distribution server when you test positive. In the second system the tokens are not linkable and they propose the use of a Cuckoo Filter to reduce the space complexity. A Cuckoo Filter is a probabilistic data structure that can tell you if an item is not or might be in a set. As a result there are some false positives.
DP-3T also explains how records are uploaded to a central server and the interactions with health-care providers. Apple-Google omit this part and focus on proximity data collection.
DP-3T also explains how records are uploaded to a central server and the interactions with health-care providers. Apple-Google omit this part and focus on proximity data collection.
Edit: Formatting + I wrote a survey paper on a few of the distributed protocols and how they defend against linkage attacks (de-anonymization): https://github.com/robertTheHub/ContactTracingSurvey/blob/ma...