I think the question is meaningless. If you believe in expensive cables, you should get expensive interconnects and matching expensive speaker cables. If you don’t think cables are important then get cheap ones.
I personally use the same make of not too expensive cable for interconnects, speaker cables and mains cables which I think makes sense.
For the first time ever I have matched cables.
got Chord Co Clearway for both interconnect (CD) and Speaker cables.
the Clearaudio tonearm has its own cable, dunno if that’s in house or provided by an outside company. It has the feel of VDH. But who knows
Joking aside there's a series point to this question. If you see a cables job as passing down the signal as unaltered as possible, I'd be interested to know which has more scope to cause a problem. I intuitively think speaker cables as if you consider the role of impedance and capacitance on the output, together with the back EMF or inductance of the speakers there's a lot that can go wrong.
Although I'm not sure to what extent a cable can reduce this compared to say damping factor/current limit of the amplifier.
I suppose the other important cable would be the tonearm cable and any cable connecting the TT to the amp/SUT/phono stage given the small voltages and risk of interference, capacitance and impedance again being a factor.
It's easy for a boutique manufacture to mess up either.
But it's even easier to get them correct.
a] for RCA interconnects, a coax with a heavy braided shield.
b] for speaker cables just two large conductors.