Power cords: does SS vs tubes drive a difference

I've not payed a lot of attention to power cords other than acknowledging they can help, the only one I had until a few weeks ago are the entry level PS Audio Jewel cables. After reading some reviews on how the Wireworld cables help filter noise,improve low volume reproduction I acquired their entry level product, the Stratus 7 and started doing my usual A/B swapping to see whether it made a difference and where it best fit in my system. What I observed was the following

1) the PS Audio Jewel cables were markedly better for high frequency articulation, dynamics and bass with tube preamp, tube integrated amplifier and tube headphone amplifier. The Stratus behaved like the problems I got from having a noise filter between wall socket and gear, snare drums were inarticulate and low bass muffled.
2) The Stratus used with the Oppo 103 or the Metrum Octave cleaned up "grunge" in massed voices providing clearer articulation in choral works like 'Carmina Burana'. I did not detect any differences in dynamics and bass between the two cables used with digital gear.

My end conclusion out of this was that tube amps are fairly wall noise insensitive but need minimal interference with current draw. Digital source gear on the other hand appears to care far less about current draw and far more about noise from the AC source.

Can't draw any conclusions about SS amplification since I don't have it.

Does this match your experience? I am going to pursue new power cables along the lines of the Stratus for CD Player and DAC, wondering if there are any other contenders out there whose design betters the Stratus 7 synergy for digital gear at an entry level price?

You observations are great. Your inferences are way newbie..
Cords react differently with different equipment. Trying to create the theories you made out of trying two cords is a mistake.
Glad you found some powercords which can help. And realize they sound different with other equipment.
power cords behave like other "cable", materials used create values of certain parameters, which affect frequency response. in other words, a power cord can affect the spectral balance and complement or reinforce colorations in the rest of your system.
I sell many powercables by blindtests. I use a poweramp of 2000 euro and a powercable of 2000 euro and a poweramo of 4000 euro and a cable of 100 euro. These days it is easier to create a higher level in sound with a poweramp of 2000 euro and a powercable of 2000 eeuro than with a poweramp of 4000 euro and an powercable of 100 euro. Purist Audio make one of the best or even the best powercables for amps. For example I use the Pass labs X250.5 with a Purist Audio 2013 Limited powercable. I hear parts in the articulation which I did not have with teh XA100.5 mono's of Pass Labs with less expensive powercables. With sources I do the same thing. A-b comparison with expensive source and cabel of 100 euro. and a less expensive source with expensive powercable. Many people are often surprised that they choose fot the option with the more expensive powercable.
How about the 2000 euro amp with the 100 euro power cord? That's the combo I'd choose.
At the end people want the best sound for the money they spend. That is why I love blindtests. You can spend your money just one time.
Power cord(s) act differently w/ different gear.
I've never used the Stratus, but I do have a couple of Wireworld Electra 5.2 cables in my system. Neil Gader reviewed these along with a dozen others PCs in The Absolute Sound a few years ago and rated them among the best of the group. They are manufactured with a higher grade of copper than the Stratus. I use one of these on my CD player and it performs very nicely. If you shop around online, you may be able to find these used at a price not much higher than the Stratus. Overall, I would characterize these as very neutral cables. Perhaps not as pronounced in the bass, but very solid. Another cable that has worked well for me on digital gear is the Shunyata Venom 3-s (not the regular Venom, but the smaller 14 gauge model)and it is competitively priced at around $75 for a 1.5 meter length, I believe.