Not really. They're just following Audi and distinguishing between saloons and coupes by a model rather than a variant.
1 series saloon - 2 series coupe
3 series saloon - 4 series coupe
5 series saloon - 6 series coupe
X3 small SUV - X4 small SAV cross-over thingy
X5 large SUV - X6 large SAV cross-over thingy
"Superman 330D M Sport" Estoril Blue / Coral Red
2PF|ZAP|ZMP|ZVI|2VF|3AP|420|488|494|5DC|688|6NR IT ARRIVED!