Projection is a logical relation between the material order of experience and the semiotic order of experience — between a macrophenomenon (a senser sensing or a sayer saying) and a metaphenomenon (an idea or locution).
Realisation is both a logical relation and an experiential relation.
As a logical relation, it is elaboration, a type of expansion.
As an experiential relation, it is one of symbolic identity, a type of identifying relation.
Realisation is an ideational relation between different levels of symbolic abstraction.
