BMW's are one of those weird brands to 'guess' the clear coat hardness. In general it has been that Sapphire Black always had very very hard clear coat and Jet Black had soft clear coat. I have worked on some BMW's in Jet Black that had crazy hard paint.
When I inquired further, I was told that cars assembled in Germany tended to have harder paint while cars assembled in the US tended (minus Sapphire Black) to have softer clear coats.
Some of the BMW's I have worked on with harder paint have been much harder than any MB I have ever worked on. It will be interesting to see how this works out.