Although similar in purpose, there are distinct differences between the two configuration options that you can use to transfer data from a field in one application to a field in another. These data transfer options are based on either linked objects or on crossover domains.
Linked objects can pass data from a source application to a target application using database relationships. In the destination application, the data value can be read, or read/write, depending on how you configure the input field. If you configure the destination input field to be read/write, the application framework automatically updates the source application and parent object if you update a displayed value.
Crossover domains, pass data from one application to a different application using domains. A copy of the data value from a source application is passed to a destination application using the crossover domain as a trigger mechanism. You cannot edit the data value in the destination application and the copied data value is static.