Which type of message has more or less the same meaning for the audience?

The type of message with roughly the same meaning for the audience is denotative.

Denotative meaning is the plain, literal, dictionary sense that most people share.

The label complex message points to difficulty of content, not the shared quality of its meaning.

Connotative meaning is the personal, emotional shade a word carries, which varies among people.

An abstract message deals with ideas hard to picture, again not the shared literal sense.

Denotation gives communication its stable common ground of meaning.