Consider the care in which manufacturers take with toslink vs rca. Most toslinks are cheap plastic and usually only 1 or 2. Manufacturers seem to take more care and pride in putting in an RCA/Coax digital for every input-usually gold plated. This tells me that internally things are probably not equal either.
Toslinks are definitely more "delicate" where good coax is sturdier, better shielded and better connections.
Finally, I've been told that good coax digital cables were designed for different impedence and voltage levels than regular interconnects.
Try them all out and see for your self?
My toys: Anthem avm-2 & denon 2200 hooked up with 6 nordost blue heavens for sacd/dvd-a and using an older tara labs digital/coax cable for normal 5.1. However, I do use a toslink to hook up my dishnetwork 501 receiver to this!
Toslinks are definitely more "delicate" where good coax is sturdier, better shielded and better connections.
Finally, I've been told that good coax digital cables were designed for different impedence and voltage levels than regular interconnects.
Try them all out and see for your self?
My toys: Anthem avm-2 & denon 2200 hooked up with 6 nordost blue heavens for sacd/dvd-a and using an older tara labs digital/coax cable for normal 5.1. However, I do use a toslink to hook up my dishnetwork 501 receiver to this!