The newer JK's are heavier, and JK 4 doors weigh as much as a full sized pickup!
My 2008 JKUR auto is over 5k lbs with lots of add-on's (aftermarket bumpers, winch, sportcage, 35" tires, long-arm suspension, added armor\skids, upgraded driveshafts and so on). Even with all of these extra's, it's not close to the weight of my F-150.