Have someone help you do a blind test. Have them connect your current wire to one speaker and the Nordost to the other one and not tell you which is which. Sit in your usual position and play something you’re familiar with and I’ll bet you won’t be able to tell which is which.
Most people won’t do such things because if they just spent hundred or thousands of dollars on a cable, it dang well better improve the sound. It’s called expectation bias and it’s science. Something that cable makers want no part of.