The distinction rests on the intended content and the benefit supplied by wording, not simply on counting words.
CategoryWording relative to meaning
Ījāz (الإيجاز)Fewer words, while the full purpose remains clear
Musāwāh (المساواة)Proportionate words for the intended meaning
Iṭnāb (الإطناب)Additional words with an identifiable rhetorical benefit
Length alone therefore does not establish eloquent expansion, and brevity alone does not establish successful concision.