Foil shields are significantly stiffer, making them annoying to performers connected to them and they deteriorate with constant flexing, making them fine for the studio or in a snake, but a time bomb for the guitarist on stage. The braid is a key issue. Conductive Inner Wrap. A conductive inner wrap under the shield will increase shielding and also reduce microphonics. This can be harder to spot, but becomes obvious when you smack the cable around.
Some cables make a lot of noise when they get tapped.
Good ones don't. If your guitars all have onboard electronics, it shouldn't be an issue. For some of the classics, it's a big deal. So you don't have to think about it, lower capacitance is better. Try to stay under 50pf a foot if you can get the specs on the cable.