Their claims change depending on the day, but they include:

* Better long tail of older device support

(meaningless if the app doesn't work, and completely debunked now that ENF supports iOS 12)

* They want to control contact tracing, rather than have the app directly notify the user

(this isn't a requirement of ENF, but the Govt falsely claims it is. In fact, ENF can still notify authorities so a contact tracing phone interview can take place. The only difference is that with ENF, you can't force a user to enter their phone number to start using the app)

* They want a better picture of the entire social graph, since ENF gives more vague / anonymous data.

This is the only partially valid claim they make, however, this is predicated on the current app actually working and providing that information, which is does not.