The process in which neuroblasts acquire specialized structural and/or functional features that characterize the mature eurydendroid cell. Differentiation includes the processes involved in commitment of a neuroblast to a eurydendroid cell fate. A eurydendroid cell is an efferent neuron found in the cerebellar cortex of teleosts. [ GOC:dgh http://purl.obolibrary.org/obo/go/references/0000021 http://www.ncbi.nlm.nih.gov/pubmed/15892096 GOC:cls GOC:jid GOC:dph ]