Seduction focuses on attraction and desire, while romance emphasizes emotional bonding and affection. Both will lead to physical intimacy, but the pathways and intentions are different.
With seduction, the goal is to ignite passion or gain someone’s attention in a way that appeals to their desires and is usually focused on short-term connections and is generally seen as a calculated approach to achieving this. Romance, however — is rooted in emotional intimacy and affection, creating a longer and deeper bond. The main aim of romance is to create and foster loving relationships (and of course, physical intimacy as the natural outflow of this.)
WB and Primal, etc. follows certain archetypes that many don’t align with very easily as it doesn’t fit their natural way of being. @Malkuth spoke of this once when running one of the Wanted titles.
Primal Romance is less focused on archetype or “style,” and more on skill and expression, like Primal Seduction. It’s for those who want to develop their ability to create deeply romantic moments in time, for the purposes of creating deep, deep emotional bonds and can be safely used in monogamous relationships, where the other titles have questionable use in that scenario.
Once again, the purpose of multiple titles that overlap yet are thematically different is to provide different personalities with the tool that best fits them. Not everyone wants to build a harem like in WB. Not everyone wants to be a Khan. Not everyone wants the intensity of Primal. Not everyone wants to just focus on seduction.
Some people seek that feeling of deep emotional richness with another, the feeling you get while quietly watching the stars on a beautiful night while holding the one you love. It’s a different experience from the oft-strategic concept of “seduction.”