@jaredpurdy - A couple of thoughts. I think there are several reasons why might not be sure you’re hearing a difference with the new cables.
1. Stress. Anxiety. Misgivings about having spent all that money. Stress WILL have an effect on your hearing. It will cause the smallest muscle in the human body - The Stapedius muscle - to tighten up. THIS WILL AFFECT YOUR HEARING.
2. Cardas cables take a long time to break in. They will continue to improve for up to 200 hours. Leave them where they are for a couple of months.
3. Expectations - no one can say what your expectations were/are with these new cables. If you do a google search on the Kano Model you’ll see how expctation & performance & satisfaction are related.
You didn’t ask for advice, but I’ll share my .02. Relax. Have no doubt. You bought a loom of killer cables for your system. They will soon sound amazing. Yes, this is my opinion and others have a right to disagree. But I am very confident that you’ll come to love the improvement in your system and that eventually you will recognize that is not subtle.
Quick A/B comparisons are very unreliable for detecting differences in sound. And even less effective at clearly identifying differences that are improvements and that contribute to the listeners ability to "hear into" the recording to understand the musical intentions of the performers. In my experience your Cardas cables will eventually help you do this. You’ll find that they are different, and that they are an improvement, and that they allow you to enjoy your system much more.