BMW M3 GTS Vs. Porsche GT3 RS 4.0 Vs. Mercedes C63 AMG Black: Which Is …

The BMW M3 GTS has a great engine and amazing chassis dynamics, the Mercedes-Benz C63 AMG Black has a wickedly charismatic V8 and quick-acting autobox. Both are lighter than their downmarket counterparts and sport huge premium price tags. But can they compete with the Porsche GT3 RS 4.0 on road and track? » 5/02/12 3:30pm 5/02/12 3:30pm