Which of these power cords ?

rilbr, same logic applies to the transformer in your devices.
The electricity flowing thru your PC is just part of another power line between the secondary of the transformer in the street and the primary of the transformer in your amplifier. No electrons flowing thru your PC are reaching the secondary which is feeding the actual audio electronics in your devices.
So if you admit that the PC has an influence you cannot reject the fact that everything from the power company also has an influence, it's the same type of galvanic isolation.

builder3  I found many of DH Labs top cables very expensive.  For instance  https://www.amazon.com/DH-Diety-Speaker-cables-connectors/dp/B00VS04002?ref_=ast_bbp_dp   1/pr DH Labs Diety Speaker cables Spade connectors in 12 feet for $7,900 or  https://www.amazon.com/DH-Revelation-SP-speaker-cables-stereo/dp/B00VS45XY0?ref_=ast_bbp_dp    1/pr DH Labs Revelation-SP speaker cables stereo w spade ends in 8 ft  for $3,850 (and very expensive for bi-wire and longer lengths).  Apparently, DH Labs has multiple levels of cost and quality cabling.  Most of their offerings are under $1,000 and very inexpensive for their lowest lines.

OP -  Question is
- Will a $90 or a $150 power cord sound any better than the stock ones?

Yes, in my experience all the components that I swapped in an aftermarket power cord improved the sound, to some degree. I would suggest buying used or if you feel comfortable making your own, go with the DIY route. There are plenty of options for good bulk wire & connectors available. You do not have to spend big bucks to get satisfying results.

fleschler976 posts01-15-2020 5:42pmbuilder3 I found many of DH Labs top cables very expensive. For instance https://www.amazon.com/DH-Diety-Speaker-cables-connectors/dp/B00VS04002?ref_=ast_bbp_dp  1/pr DH Labs Diety Speaker cables Spade connectors in 12 feet for $7,900 or https://www.amazon.com/DH-Revelation-SP-speaker-cables-stereo/dp/B00VS45XY0?ref_=ast_bbp_dp    1/pr DH Labs Revelation-SP speaker cables stereo w spade ends in 8 ft for $3,850 (and very expensive for bi-wire and longer lengths). Apparently, DH Labs has multiple levels of cost and quality cabling. Most of their offerings are under $1,000 and very inexpensive for their lowest lines.

My remarks were limited to power cords, since that's what the OP asked about.

builder3 Sorry, you're correct.  I just wonder why their speaker wire is priced at SOTA prices.