In brief, the slightly lower resistance of 10ga wire is meaningless compared to 12ga(or even the 16ga lamp cord I use)at the length used for main speakers. Minute differences which can be measured but can't be heard are quite common in audio.
John, one other factor is the ascetics of the products. Part of the reason i bought the products to make the cables that i use is the way that they look. I think that my cables look nice, comparable to cables selling for hundreds of dollars.
I would agree, that the resistance between pretty much all cables at or under 10ft is very minimal.
