Pluralian 4 Monoian/Monoian 4 Pluralian, Plunoian
Pluralian 4 Monoian/Monoian 4 Pluralian - basically just Mspec4mono/mono4mspec, but using the terms Pluralian[link] and Monoian[link]. Can be used to describe both relationships between Pluralians and Monoians, and/or preferences for relationships.
Some reason someone might have this preference include: the mspec/pluralian person being trans and finding it gender affirming to date people who are only attracted to their gender. The Mono/monoian person being multigender and/or genderfluid and wanting to date people who are attracted all their genders. Preferring date people with dissimilar experiences with orientation from one's own either because one finds learning about the other experiences with their orientation interesting, or because someone who has a dissimilar experiences with orientation from one's own is often less like to try to gatekeep what a "correct" expression of one's orientation is.
Plunoian - A combination of Pluralian and Monoian for these who are both or in between. While this does include all traditional mspec monos, it also includes experience such as; being attracted to multiple genders that are similar to each other* and not being sure if one classifieds is as mspec or mono, being exclusively attracted multigender people, being uniattraction or atomo and being attracted to someone who transitioned, among other experiences.
*While genders similar to each other could mean genders with the same alignment, the genders could also be similar in other ways, for example one may consider all demigenders similar even though traditionally demiboy and demigirl are considered "opposites".