The only thing close to variable data is Auto Serialization (Variable Data) and this feature is available only for PhotoPRINT Server PRO while for the PhotoPRINT DX is marked as optional.
Let's say that the feature you need is partially supported.
The PDF guide with all the info is located on the following link: http://rolanddg.com.au/literature/PP6_DS_SERVERPRO.pdf
Note: There is a table where you can see all the comparison details.
