It's a high-powered car with a heavily rear-biased AWD system - it will always be able to get sideways in low-traction conditions, LSD or no LSD. The benefit of an LSD is a more
precise distribution of power across the rear axle, meaning it's easier to control what the rear is doing as the absolute limit of adhesion under acceleration. This doesn't meant the cars without the LSD can't slide on the power, the car will simply lose momentum (forward and sideways) more easily because it will want to send power to the inside
wheel. Of course, on the street, none of this really matters - especially in super-slippery conditions like snow. There's so much power to the rear that you can always upset it, holding lurid slides pretty well as long as you please. Ask me how I know
In fact, the benefits of the LSD are masked by the AWD system itself, because the car will shift power forward to control the angle of attack, which has an even greater effect on how it behaves. This is the reason the engineering team originally didn't even spec the AWD models with the LSD at all, like
Stinger. It was only when we argued the LSD would be of benefit on track and for true enthusiasts that they agreed to make it available for both driveline types.
Bottom line: the LSD is a fun tool that makes the rear of the car slightly more pointy, but in this platform the difference is not so dramatic on the street that anyone should worry too much about it. (Exception: in the pure RWD cars the U.S. sells, you
definitely want the LSD for the 3.3T).