It all comes down to the driver. Yes 5.0s are a bit faster than some SS from factory, but with the wrong person at the wheel, the 5.0 is a cow. Same goes for the SS and most manual cars.
2013 1SS LS3/Cold Air Inductions/VMAX ported tb/TSP 1 7/8 LTs and xpipe/factory NPP axleback/BTR stg 3 cam kit/ZL1 injectors/3.91 gears/MGW sts/DSS carbon fiber driveshaft/DSS 1000hp axles/BMR LCAs & adj. toe rods/DSMLIGHTS E85 dyno tune 454/427 running out fuel. ZL1 fuel pump, McLeod twin disk, and retune coming soon