Just how super does a supersedan need to be? That's the question posed by the 2014 Jaguar XFR-S. This winged warrior promises to take the already potent XFR to the next level. Visually, we'd say that it does; particularly in French racing blue, the XFR-S looks very much the part of a supersedan. Compared with the R, the R-S gets unique twenty-inch wheels wrapped in ultra-low-profile high-performance rubber, a deeper front air dam with vertical vanes, extended lower body sills, a rear diffuser, and that giant rear wing. (Those who find the latter excessive can opt for a trunk spoiler instead.) The interior is a different story, with patches of carbon-weave leather the only element kicking it up a notch over the XFR. Both cars, though, have excellent, highly bolstered sport seats with adjustable lateral support and an 825-watt Meridian sound system. Both also suffer from a small, outdated touch screen and dark mesh aluminum trim that doesn't pack much visual impact.