Old fashioned analog speed versus Vorsprung Durch Technik.
We love super sedans, as does most anyone with a real appreciation for European cars. But the segment is largely ruled by the Germans, and despite some very sincere efforts from other countries, the German Big Three remain the first names you think of for super sedans. But with the XFR-S, Jaguar went in a slightly different direction from the Germans. It's more of an analog experience, something decidedly un-German.
Some might even call it a more pure driving experience, although we're guessing that Germans and their fans would just call it slower. It is ultimately, obviously, a matter of opinion.