Zenblaster, That is a really good question, and I asked myself that same question as I compared the cords. Read my answer to Charles1dad above, then let me add the following.
I bought the two new cords for my monoblock Cary amps. Rather than put an arbitrary number rating on the difference, let me put it this way. When it came time to return my friends borrowed cords, I took them out of my system one at a time. I took the two away from the amps last, and was just appalled. Pretty much one of those "No, this isn't going to cut it at all" moments. Now, before I borrowed the cords, everything sounded just fine. After hearing what the Cary amps sounded like with the Airsines, then putting the Signals back in, it just sucked all the life out of the Carys. I ordered my two Airsines 3 days later, after I discovered that I was not going to be satisfied until I had recaptured what I had lost. That was a huge step back. If it was 100 with the airlines, it was maybe 65 without them. The Airsines simply turned the Carys into new amps.
The AirSines cost 15 x what I payed for the Signals. Are they 15 x better? Yes, maybe for me they are. Tonight, a used 4' Airsine was offered for sale and I bought it immediately, so once that arrives, I should be in really good shape. It will go into service supplying my Audio Magic MiniRef II.
It is all system dependent. For me, the AirSines distinguished themselves in 3 out of 5 applications. I've got my 3 Airsines now, and life is good!