Does anyone know how big the difference is, if any, between WA812K (Medium Spiral Grey Metallic) and WA8573 (Medium Grey Metallic)? I was looking at getting some Duplicolor Perfect Match paint for some touchup in the wheel well areas and they have Medium Grey Metallic but they don't have Medium Spiral Grey Metallic. The cap on the paint can looks spot-on for my 2004 which has the Medium Spiral Grey Metallic but Duplicolor says their paint is the Medium Grey Metallic, not the Spiral version. I'm curious if it's the same color and was just a name/paint code change because as far as I've been able to find, the Medium Grey Metallic (WA8573) was only used on the Pontiac Lemans in '88-'89 but the Medium Spiral Grey Metallic (WA812K) was used on a dozen or so different GM cars from '03-'06 including our Montes.