A comparison of transmitters cannot rest on which collection contains more names. The relevant inquiry is the aggregate moral reliability and precision of those whose reports are advanced as substantive proof.
Some narrators in Muslim’s collection were discussed critically; several narrators prominent in Bukhari also belong to the wider circles from which Muslim transmitted. Selection and use, not simple inclusion, must be examined.
Caution: A narrator's appearance in a collection does not grant equal evidentiary weight to each report associated with him. Primary support and supplementary corroboration may occupy different roles.