Hi @RonJos
Yes, this can work under a single Adobe Target Enterprise license and IMS Org.
In both the case, think of Adobe Target as the activation layer, while audience qualification can come from different sources depending on how each site is implemented.
For Site A, since it's connected to AEP/RTCDP through Web SDK, you can build audiences in AEP and share them to Target using the Target destination. Those audiences will then be available for targeting and personalization on Site A.
For Site B, which uses Marketo and at.js without AEP/RTCDP, you would typically rely on Marketo-derived data being passed to Target (for example, segment membership, lead attributes, or profile data) and create Target audiences based on those values.
The key point is that Target does not require all sites to use the same audience source. As long as each site sends the appropriate data to Target, you can run experiments and personalization activities for both sites while keeping the audience definitions completely separate.
Would like to know , when you are referring to "Marketo audiences", for Site B, are those audiences already being passed to Target today, or are you looking for a way to make Marketo segment memberships available within Target for audience qualification? Can you clarify this? that determine to better approach.
Hope this helps.
Looking forward to hearing from you
Thank you.