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

I would toss a coin to see which cable sounded better and then I would listen to both of them to see if the coin toss was correct.

DeKay

Yeah I am struggling.  Like them both and will sell the other.  Would rather keep what is perceived as better but it is a tough call!

Listen to each one for a week straight.

I often read that humans have the sonic memory of a Goldfish, but then why can we recognize the sound of a persons voice (not  seen/heard) for decades?

DeKay

I've never compared power cords.  I just plugged them all in.  I can't say I've ever heard a big difference. 

I don't have any real expensive cables. One by Crystal Clear Audio (Signature silver cable), some by Core Power Technologies, and some by XLO and Audioquest.

I suppose I should try comparing them some day. 

First world problem. Don't waste your time agonizing over insignificant details. You said both sound good. Pick the prettier or cheaper one and sell the other. Spend more time enjoying the music.