This is a really great mic cable and it's really flexible. The "SW" version has no separator between the two counterspiraling winds of shielding, which should be the normal choice for most people. The other version has a separator between the two spirals so you can either solder them both to pin1 normally or solder one shield to pin1 and the other to the plug casing for an independent chassis ground - this can be useful if you have the option to lift the ground from all of the equipment you're using, but will generally cause more problems than it fixes in ordinary use, and is usually unnecessary unless you have an explicit noise problem.
