This question was debated at length in this thread
, which focused mainly on power cords but also touched on other cables as well.
There was, of course, no consensus.
A single Manufacturer will "Know" that all of their cables and interconnects "play well" together and have complimentary electrical characteristics. They will not be fighting each other and creating bad match-ups.
I would respectfully disagree with this. Many and arguably most cable effects, at least those that are technically explainable, are dependent on technical characteristics of the components that are being connected. Input and output impedances for example, among MANY other things.
I cited several component dependencies relating to power cords in this post
in the thread I linked to above.
With respect to interconnect cables, consider a comparison between two cables, one having relatively high capacitance and one having relatively low capacitance. When driven by a preamplifier or other line-level component having relatively high output impedance, the higher capacitance cable will have a duller and less extended upper treble than the lower capacitance cable, everything else being equal. That will be a consequence of the interaction between the capacitance of the cable and the output impedance of the component driving it. But if those same two cables are compared when being used as phono cables, in conjunction with a moving magnet cartridge, the exact opposite will usually be true -- the higher capacitance cable will have a brighter and more extended upper treble. That will be a consequence of the interaction between the capacitance of the cable and the inductance of the cartridge.
Similarly, the sonic effects of speaker cables will be dependent on speaker impedance, variation of speaker impedance as a function of frequency, use of feedback in the amplifier, amplifier bandwidth, criticality of woofer damping, and other variables.
And a whole litany of complex component-dependent interactions and technical variables could be cited with respect to sonic differences that will be perceived between digital cables.
So the manufacturer of a one-brand cable loom cannot assure that the cables will play well together, because they play primarily with the components they are connecting, not with each other.
IMO. Other opinions will certainly differ in some cases, as can be seen in the other thread.