Over the last 30 years I have experimented with all sorts of power cables.
1. their impact on sound quality in terms of transparency and attack is significant.
2. Their performance can be significantly enhanced by using contact enhancers from e.g. Caig, Acoustic Revive or Mad Scientist Audio
3. In highly resolving systems solid core OCC cables tend to outperform Litz- based cables, particulary on leading edge and reverb. My favorite here are the Acoustic Revive and upper end Nordost cables.
4. Before overspending on power cables I would focus on having a dedicated spur with good power points such as Furutech, Acoustic Revive.
Enjoy the music