There are 6 tags that are only present in our ontology: affix, contraction, and idiomatic (all of them needed here because they are elements present in dictionary and grammar content); article and predeterminer (both subsumed under determiner in UD); and ideophone, not accounted for in that ontology.
the UD POS tagset has categories not available in our proposal: tween the OGL Ontology and each of our bilingual dictionaries.