I have both
LR4= Fast, smooth, refined, modern, 7- passenger
G-Wagen= Slow, stately, heritage, solid axles, durability, longevity, unique
They are about the same on the trail. The LR4 can be found with a rear locker.
The LR4 gets about 30% better fuel economy.
They are both cool trucks- buy the one that turns you on.