S/Pdif vs. Toslink

I picked up a Musical Fidelity V-Link to use between my Macbook and my Cambridge 840 CDP. The V-Link can send data to the CDP via either S/Pdif or Toslink. I went with the Tosslink but more on a whim that with any actual reason.

Does anyone have a preference for Toslink over S/Pdif, or vice versa? Just curious what people are using and why.

Regards