[99-ls1-ss]

Does anyone know if the M5 CS actually has different tuning and more (dyno proven) horsepower than the M5 Competition or is the power the same but the CS is faster because it's lighter? I've searched the interwebz and haven't seen any side by side dyno comparisons for these two vehicles.

*Edit - I'm trying to determine if the engine/transmission tuning is different between the M5 CS and the M5 Competition. I added performance numbers from Car and Driver below. I know there are a lot of factors that can change the performance of a vehicle like different weather, track conditions and driver skill. C/D is one of the few places that I've found that has tested all 3 versions of the f90.

Here are some specs according to Car and Driver

M5 CS
Power: 627 hp @ 6000 rpm
Torque: 553 lb-ft @ 1800 rpm
Curb Weight: 4096 lb
0-60 mph: 2.6 sec
0-100 mph: 6.2 sec
1/4-Mile: 10.6 sec @ 130 mph
150 mph: 15.5 sec
Rolling Start, 5–60 mph: 3.8 sec
Top Gear, 30–50 mph: 2.5 sec
Top Gear, 50–70 mph: 2.5 sec
Top Speed (mfr's claim): 190 mph
Braking, 70–0 mph: 150 ft
Braking, 100–0 mph: 294 ft
Roadholding, 300-ft Skidpad: 1.02 g

M5 Competition
Power: 617 hp @ 6000 rpm
Torque: 553 lb-ft @ 1800 rpm
Curb Weight: 4237 lb
0-60 mph: 2.8 sec
0-100 mph: 6.7 sec
1/4-Mile: 10.9 sec @ 128 mph
0-150 mph: 15.8 sec
Rolling Start, 5–60 mph: 3.7 sec
Top Gear, 30–50 mph: 2.5 sec
Top Gear, 50–70 mph: 2.6 sec
Top Speed (mfr's claim): 190 mph
Braking, 70–0 mph: 139 ft
Braking, 100–0 mph: 281 ft
Roadholding, 300-ft Skidpad: 1.00g

M5
Power: 600 hp @ 6600 rpm
Torque: 553 lb-ft @ 1800 rpm
Curb Weight: 4288 lb
0-60 mph: 2.8 sec
0-100 mph: 6.6 sec
1/4-Mile: 10.9 sec @ 129 mph
0-150 mph: 15.9 sec
Rolling start, 5-60 mph: 3.7 sec
Top Gear, 30-50 mph: 2.2 sec
Top Gear, 50-70 mph: 2.4 sec
Top speed (governor limited): 163 mph
Braking, 70-0 mph: 147 ft
Braking, 100–0 mph: Not tested
Roadholding, 300-ft-dia Skidpad: 0.98 g