Ferrari’s latest 562bhp V8 Berlinetta has changed the way we think about sports cars - it’s the first of a new, digital breed. The Porsche 997 GT3 RS is perhaps even more stunning on road than it is on track. Its ingredients are more basic, but its appeal is infectious. They’re not direct rivals, but they’re two of the most exciting high performance cars we’ll drive all year. Chris Harris attempts to adjudicate...