The Web Ontology Language (OWL) is a vocabulary for creating ontologies, i.e
The Resource Description Framework (RDF) is a language for representing information about resources in the World Wide Web
Expressive complex relations
"Owl is richer than languages such as rdf schema rdfs"
from question "* (no title is found for this review)"
"Owl and rdfs are more expressive than rdf which means here that you can capture more complex relations for instance you can also represent the link between sets of things rdfs subclassof or use transitive properties hasancestor"
from question "What are the limits to expressability of RDF / OWL / etc"
"Owl is a more advanced language than rdf"
from question "About semantic web, RDF and OWL"
"Owl provides more mechanisms for asserting shapes of rdf graphs as does new work on rdf shapes"
from question "How to validate JSON-LD against an schema?"
"Owl has more structure than rdf"
from question "What is the recommended way for adding individuals with SPARQL UPDATE?"