I'm looking into Dorico 6, though I see it can only export MusicXML. Can S1 6 import MusicXML files allowing me to go back and forth.
Import and export
Projects often start or finish outside your scoring software. Dorico can import MusicXML and MIDI files from Cubase, other scoring programs and other DAWs. It can also export MusicXML files, allowing you to take projects started in Dorico into other applications.