If they deny the authority of the Pope, then they aren't Catholic.<quoted text>The Episcopal Church,which is both catholic and reformed at the same time. holding onto catholicity of the early church all the while seeing this through the enlightenment of the Reformation.
Some of the primary differences of the Episcopal church are rejection of the idea that the Bishop of Rome (Pope) has primary authority over the Church Universal.... look it up yourself if you doubt this and be sure to read the article i posted about the two churches joining forces.
Please don't take my word for it. Ask if they think they are interchangeable with the Roman catholic Church.