The seats on my previous VS were the standard size and the side bolsters were too snug for my preference (translation; my fat a$$).
On my current 2015 VS I opted for the wider Speedster seats that VS had as an option. This car is a daily driver plus my wife & I frequently go on extended trips (200-250 miles). The side bolsters still provide side support without compromising on comfort.
Here is a pic for visual reference. click on pic to enlarge. Hope you find this info useful.