All 3 cables have smaller cross section surface area that is equal to or less than the cheapest lighting cable
Any power cable you buy from the shops is always going to be “inferior” to the in-wall cabling in terms of cross sectional area. So the notion that $5 cable you can buy from the reject shop is going to be better than in wall cabling is demonstrably false.
Do power cables make a difference? Absolutely, and not at all. There are too many variables at play - it all depends.
And here is where we come to the most common take down from camp #2. Yes, power cables did not make a difference because the gear is not good enough. The truth is that simple. We all know this, and there should be no shame in admitting your system and you is simply not good enough.
I know my system is not good enough to demonstrate the effects of power cables conclusively. My system is around 5% to 15% of a world class Hifi system, and I’m being generous here.
Instead of experimenting with cables in your own system, or arguing theories on the Internet, perhaps more of you can venture out and explore other peoples’ systems. Find audiophiles in your area who claimed power cables make a difference, ask them for a demonstration. It is important to ask the audiophile to explain the differences he hear to you, this allows you to listen to music from his perspective and not yours.
If like me, you are lucky enough to meet a world class audiophile and a world class system to demonstrate the difference a cable can make, that meeting will change your point of view on music forever.
Power cables is just the tip of the iceberg. There’re clocks, transport mechanisms, valves/SS, power supplies, cables and more! And they’re all linked in a complex relationship. Only the best audiophile managed to untangle this puzzle, and their insights is going to be valuable.
Arguing or researching on the Internet is not going to make your audio system better. Finding systems that sound better than yours will.