Yes, it will be. UKAMF enables an individual to use a single username and password, provided by their home institution (say a university or college), to gain access to online resources provided by many others, typically a publisher. The publisher will grant or deny access based on information – attributes – released by the home institution. More info can be found at https://www.ukfederation.org.uk
UCD goes a big step further, enabling an individual to choose a PDS provider as their personal agent, i.e. as an intermediary in (potentially) all their online relationships, including that with their home institution.
Thus an individual will keep the same PDS account – possibly porting it from one PDS provider to another – throughout their educational career, and will be able to use it to share attributes from any party to any other. So UCD will be able to offer not just the functionality provided by UKAMF, but much more, starting with a portable personal achievement record, proof-of-student status, low value payment, proof of identity etc.