Do I have my power cords in the right spot?

Agree with all noted above; you just have to listen. Also good to keep your Cables tidy and keep distance from others, keeping power cords away from your IC’s the best you can. As your PC’s lay on the floor, also good to keep them away from your speaker cables - best not to run anything parallel with each other if you can help. Lastly if you can keep all cables off the floor that is good too. Easy to make your own cable lifts.

For a somewhat specific answer to your question, try swapping the Punch and Pangea, and if there's no difference, well... refer to the other posts about your preference/ears.Cheers!

Try listening to tracks in which your system doesnt shine so well . If you test with tunes that sound good on any setup then you will strain too hard to tell the difference. .

Ignoring there are two map2 cords, there are a great many possible combinations.

Swapping them around is a fools errand as D1/C1 D2/C2 maybe better with D3/C3 than with D3/C4.

To properly conduct the test, you need a duplicate set of Cords to swap each cord type into each Device.

Given that systems and our perceptions of same change continuously, FOGEDDABOUDIT!

That's for the advice