I have had a varying quality of ADB cables, but over time as they get bent/twisted it seems to degrade as it either breaks the RF shielding strands in the cable causing interference, or sometimes it can degrade the connections of the wires to the pins. Now-a-days, ADB cables suck for S-Video due to the age plus the low standards of how they are made. ADB doesn't pass as much data, and at the same rate/constant that S-Video does, so it really doesn't need to be built to the quality of S-Video.
However, S-Video was partially designed to replace component cables as it uses the RGB + sync signal (or ground) which can cause a poor quality than Component but it does much better than composite (with a smaller connector)
S-Video will obviously give you a better signal than composite, but at a slightly increased cost due to splitting the signals, the timing and the requirement for stricter cable quality construction. ADB cables from Apple (and maybe NeXT which I believe also uses it) don't need to meet the quality as Texas Instruments and Apple (I think both had a hand in designing it) both decided they only needed a certain quality to keep the price down and since it doesn't matter too much on the data transfer (and I think had error correction on it too with encoding).
S-Video carries analog vs digital of the ADB, so S-Video can't correct signal like ADB does.
Either way, the pins are the same on both ends between ADB and S- video. The only real difference is the data they carry and the strict quality they have to meet.
ADB cables work as S-Video in a pinch, but I wouldn't use them to do a presentation on an old projector. It will not make a good presentation with a fuzzy pie chart.
However, S-Video was partially designed to replace component cables as it uses the RGB + sync signal (or ground) which can cause a poor quality than Component but it does much better than composite (with a smaller connector)
S-Video will obviously give you a better signal than composite, but at a slightly increased cost due to splitting the signals, the timing and the requirement for stricter cable quality construction. ADB cables from Apple (and maybe NeXT which I believe also uses it) don't need to meet the quality as Texas Instruments and Apple (I think both had a hand in designing it) both decided they only needed a certain quality to keep the price down and since it doesn't matter too much on the data transfer (and I think had error correction on it too with encoding).
S-Video carries analog vs digital of the ADB, so S-Video can't correct signal like ADB does.
Either way, the pins are the same on both ends between ADB and S- video. The only real difference is the data they carry and the strict quality they have to meet.
ADB cables work as S-Video in a pinch, but I wouldn't use them to do a presentation on an old projector. It will not make a good presentation with a fuzzy pie chart.