Nothing has changed behind the shiny louvres that make up the GT's aggressive Panamericana grille, with the GT C soldiering on with 557bhp and 680Nm while the GT R's four-litre twin-turbo V8 is beefed up to produce 585bhp and 700Nm. Both sets of outputs are piped exlusively to the rear wheels via a seven-speed AMG Speedshift DCT, propelling the GT R and GT C to 100kph from a standstill in 3.6 and 3.7 seconds respectively. Flat out, the GT R leads the way with a top speed of 318kph - just 2kph more than the GT C's limit. 

That said, the GT R continues to be AMG's poster child on the circuit- at least in the absence of the GT R Pro - with track-focused features such as additional airflow channels and air curtains, forged aluminium suspension, fixed rear wing and a carbon fibre roof. The R's AMG Track Package adds on a bolted steel roll cage, a 2-kg fire extinguisher and even a pair of AMG bucket seats with four-point harnesses. So while both cars are similarly endowed on the straights, the GT R's motorsports-derived components will naturally allow it to shine brighter on track days.