In al-muttafiq wa-l-muftariq, agreement is in the visible form of names or their components, whereas difference lies in the separate human beings who bear those names. The reports of two people sharing a name must not be merged as though they came from one person.
The coincidence may involve the personal name alone or include the father's name, grandfather's name, or nisbah. Greater similarity increases the risk of confusion, but does not establish identity.
Example: Two distinct transmitters are called “Muḥammad ibn ʿAbd Allāh” and belong to different generations. Combining their transmissions would distort chronology, hearing opportunities, and judgments about reliability. Genealogy, dates, and teachers are needed to distinguish them.