Pretty sure cargo dragon is just a stripped down crew dragon to make more space for cargo.
Or maybe, crew dragon is a cargo dragon fitted for passengers… Seeing as cargo dragon flew with cargo and docked to the ISS in 2012 (crew dragon was 2020).
Pretty sure crew dragon has all the auto/remote to fully launch and then dock to the ISS.
Cargo dragon is auto/remote docked. Doesn’t even need canadarm. So would make sense that crew dragon is as well