well in my opinion, they are both awesome rigs, have owned them both...but the way they presently sit, yours, but it also comes down to the driver
stock for stock, you can get more flex out of an XJ then a YJ..YJs are stiff as logs, but the XJ, even with the rear leaves, they flex amazing...my XJ with 2 inches of lift and stock shocks, and springs, flexes 3 times the height that my YJ did with 3.5 inches of lift
plus you can get a stonger rear axle on an XJ then a YJ...and im not sure if you can get factory limited slip in a YJ with the d-35...
ill say this, the only thing i liked more about my YJ was i could take the top and doors off..but i as far as everything else goes, i love my XJ more
look how pathetic this is with the YJ...3.5 inches..no sway bars or track bars..
now look at my XJ with 2 inches of lift and now front sway bar