Which is faster?

The Porsche 981 Cayman GTS is faster — 5.9s quicker on average across 3 shared tracks.

Specifications

Specifications	Porsche 981 Cayman GTS 981 Cayman GTS	Mercedes SLS AMG Black Series SLS AMG Black Series
Model Years	2015-2016	2013-2015
horsepower	335	631
torque (N_M)	380	635
weight (KG)	1,345	1,656
Power to Weight	0.25	0.38
Rank	#155	-
Tire	300 PILOT SUPER SPORT 235/35/20 / 265/35/20	180 PILOT SPORT CUP 2 275/35/19 / 325/30/20
engine Description	3.4L NA flat-6 (MA1)	6.2L NA V8 (M159), 631 HP
gearbox	6-SPEED MANUAL	AMG SPEEDSHIFT DCT 7-SPEED SPORTS
drive Type	RWD	RWD
wheelbase (MM)	2474	2680
width (MM)	1801	1976
length (MM)	4374	4646
height (MM)	1273	1262
0 - 60 MPH	4.3 SECs	3.2 SECs
top Speed (KPH)	285	315
price MSRP	$ 85,000	$ 250,000
Current Value	$ 67,000	$ 590,000
OVERALL VS AVERAGE LAP TIMES	+1.21s	+0.89s