Depends on the era
Late 2010s-present = BMW
>era of B58, xDrive, and ///M car supremacy
Late 2000s-mid 2010s = Mercedes
>6.2 V8 AMG supremacy, strong C/E/S/CL-Class, 4.0TT V8, 3.0TT V6, SLS AMG, SL65 AMG Black, AMG GT
Late 90s-mid 2000s = BMW
>E38, Z8, E46, E39, E60, 6 Series, Z3, Z4, E90/E92, N54, iDrive, and some of the most iconic ///M cars