The cars are completely different classes. The X6 competes with infiniti FX,Porsche Cayenne, and Audi crossover(don't know the name). The Jaguar XF competes with luxury sports sedans like the BMW 5 series and Mercedes E class. As far as my personal preference, I think these crossover SUV's are ugly.
Jaguar XF was created in 2008.
The 2010 Jaguar XF has 32 valves.
The 2011 Jaguar XF has 32 valves.
The 2009 Jaguar XF has a V8 engine.
The 2013 Jaguar XF has 16 valves.
The 2010 Jaguar XF has a V8 engine.
The 2009 Jaguar XF has 32 valves.
The 2014 Jaguar XF has 16 valves.
The 2012 Jaguar XF has a V8 engine.
The 2011 Jaguar XF has a V8 engine.
The 2012 Jaguar XF has 32 valves.
The 2010 Jaguar XF is a gas-powered vehicle.