If you are thinking a spec sheet will somehow help you determine what they might sound like, or to construct to a sound. It is not going to do either of those.
Somewhere in the research labs of some of the major cable producers there may be such a thing. With long lists of variables and how they may affect the sound. But even these would likely only be generalities.
I am by my nature a numbers man. As a scientist in my first career and years as an analyst in the corporate setting. I threw away the numbers other than a few high level ones in audio. They just led to erroneous conclusions.