As said, in the mk6 days there was Carbon Grey (darker) and Steel Grey (lighter). For mk7 it now seems to be just the one known on the vw configurator as Carbon Grey Metallic, which is the darker one formerly known as Carbon Grey. Seems to also get referred to as Carbon Steel Grey (CSG). Confusing eh!
Pic below (though American) demonstrates the two different colours. Top pics - Carbon Grey, bottom pics - Steel Grey.
