The restriction dūn al-taqfiyah in the definition of muwāzanah keeps two sonic features apart: corresponding pattern and corresponding rhyme. Rhetoricians discuss whether their broader categories can overlap or remain mutually exclusive.
Final-letter agreement is fundamental to sajʿ; pattern correspondence is fundamental to muwāzanah. Some technical schemes therefore distinguish them sharply, while more expansive usages allow possible overlap.
For classification practice, maṣfūfah / mabthūthah is the clearest illustration: matching patterns without the same terminal rhyme.