Capability requires a wide berth, as there are so many variables. Typically, a stock Jeep Rubicon will outperform any domestically available platform, just by the nature of the design and hardware. Lockers, sway-bar disconnect, 32" mud tires, long-travel suspension, etc. etc. It is just the reality of it. However, I would not say that an 80 series with factory lockers trails that far behind. Where is struggles is on the body damage front. A Jeep Rubicon is really just that much better, narrower, and fitted with factory sliders, etc.
There are places other trucks are better, like a Power Wagon in mud would eat a Jeep Rubicon. More power, larger tires and a longer WB.
The specific design requirement of the Wrangler IS capability. It sacrifices everything else to that end. The specific design requirement for a Land Cruiser is not just capability, but reliability, durability, capacity (payload), cargo space, personnel transport, etc.
It is really not an offense to say that a Jeep Rubicon is generally more capable than a 60 or 80 series Land Cruiser (in stock form). A Land Cruiser just has other functions it also serves, in addition to excellent capability.
And remember, this discussion only makes sense if you compare stock trucks to stock trucks, or else you are just comparing modifications. Sure, you can make an 80 series compete at the extreme ends of capability, but it will be at the sacrifice of other attributes.
For me, however, the ultimate solution to all these problems is the 70 series TLC. Ultimate capability, capacity, durability and reliability