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Solid copper core is certainly necessary with high-current draw amps with very long runs. If one has a low-draw pre-amp, the extra DC resistance of the the CCS core is irrelevant, especially on amps that have power supplies that provide several volts more voltage than the pre-amp actually required. The 8700, for example, draws very little power, as do most of the rest of the legacy 8700/8800 WG amps.
If you use SC coax and don't weatherproof it, it will rot out, just like CCS will, making the distinction again, irrelevant.
If care is taken to weatherproof, the cable runs are of moderate length (<100'), and you're not using a power hog of a preamp (the current 7777 comes to mind), there isn't a bit of performance difference between the two types of cable. At RF (TV signal) frequencies, there is no difference.
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