SRT is also lower and has extra pieces to control air flow under the body.
For a popular description see here
but over the ton aerodynamic lift starts to become important. This is the reason for some of the strange motions (e.g. Carl Edwards incident) seen in NASCAR.
Of course the only real way to know is with a wind tunnel & strain gauges on each wheel. I suspect Chrysler has that information.
Personally am more interested in how it acts when pulling a trailer at 70.