Tashṭīr concerns larger segments of verse and the correspondence of their internal endings. Tarṣīʿ is closer word-by-word, comparing the pattern and rhyme of paired expressions.
A couplet may exhibit tashṭīr without all corresponding words being arranged in the fully ornamented manner of muraṣṣaʿ. Conversely, a locally ornamented pair need not create the complete segmented design of tashṭīr.
DeviceMain test
TashṭīrSegmented hemistichs and corresponding internal endings
TarṣīʿExtended pattern-and-rhyme agreement between paired words