Toslink, no matter the quality, is no comparison to SPDIF.
The reason is that to create the optical signal it must go through an additional optical EMITTER and an optical RECEIVER in addition to the rest of the circuitry. All things being equal those optical devices mess up the signal.
The reason is that to create the optical signal it must go through an additional optical EMITTER and an optical RECEIVER in addition to the rest of the circuitry. All things being equal those optical devices mess up the signal.