Which is faster?

The Porsche 991.1 GT3 RS is faster — 37.5s quicker on average across 3 shared tracks.

Specifications

Specifications	Porsche 991.1 GT3 RS 991.1 GT3 RS	Mazda Mazdaspeed3 BK Mazdaspeed3 BK
Model Years	2015-2018	2007
horsepower	500	263
torque (N_M)	458	380
weight (KG)	1,420	1,488
Power to Weight	0.35	0.18
Rank	#29	-
Tire	180 PILOT SPORT CUP 2 265/35/20 / 325/30/21	220 RE003 225/40/18
engine Description	4.0L NA flat-6 (9A1)	turbocharged 2.3-liter MZR L3-VDT I4
drive Type	RWD	FWD
wheelbase (MM)	2456	2639
width (MM)	1880	1755
length (MM)	4544	4486
height (MM)	1290	1466
0 - 60 MPH	3 SECs	6 SECs
top Speed (KPH)	311	249
price MSRP	$ 195,020	$ 22,740
Current Value	$ 205,000	$ 8,500
OVERALL VS AVERAGE LAP TIMES	-6.96s	+1.21s