A proportionately phrased report demonstrates musāwāt. But praise, warning and argument may demand special emphasis, elaboration or compression; proportion alone does not guarantee rhetorical superiority.
For example, حَضَرَ الْمُسَافِرُ reports that the traveler arrived. It can be adequate when arrival is all that matters. حَضَرَ الْمُسَافِرُ بَعْدَ طُولِ انْتِظَارٍ adds that the arrival followed a long wait. If that circumstance is part of the communicative purpose, the extra words do real work. The distinction cannot be reduced to counting words.