[sratner]

The difference is that you can continue tracking a person indefinitely, even after they are no longer infectious. It requires explicit user action to avoid that (opt-out vs opt-in).

[FabHK]

If the DP3T app is implemented to spec and creates a new random daily key after the infectious period ends, no.

If the A/G app is not implemented to spec and keeps uploading daily keys even after the infectious period is over, yes.

So, dunno. A/G has a bit more privacy (maybe) for 5x more data volume than DP3T.