Advice needed: Have 2 Power Cables only need 1 - Which is better?

I’d sell both, buy A better Cardas or a Shunyata With NR! You’ll be happier

Okay, I've got my helmet on.  Power cords don't sound like anything at all. They can and will make your electronics sound different. It all depends on what you like them to sound like.

To those nonbelievers:  Power cords make an audible difference.  The degree of difference depends on multiple factors including the resolution of your system, the amount of  EMI your system is subject to where the cord shielding will have significant effect in preventing EMI from entering your system , and the design of the cord itself to provide stable power and current,  and prevent EMI emissions from current flow.  
 

To the OP.   I have no direct experience auditioning these cables but read trade journal reviews extensively (Stereophile, TAS, ToneAudio , WhatsBest etc).  So read below with this in mind and please audition to validate findings of these reviewers.  There is no better cable, just how a cable affects sound quality. The DAC you have presents with a warmer side of reality similar to the Cardas house sound.  So detailed romantic warmth and organic flow will be enhanced.  The Running Springs house sound focuses on clarity, speed, and bass slam so it will reinforce these qualities with your DAC.  It becomes a matter of personal preference since both excellent in all other build and sound quality attributes.  

Record the sound of PC. Post both videos/sounds. Then I’ll recommend which sounds better.

Remember. The better the PC, the recorded sound is closer to the original music. Alex/Wavetouch audio

I paralleled two $1000 power cords.  What a difference!  Twice as cool!  Half as warm