The tundra is badass! for reference I have wheeled a short wb jeep on 35s
Technical trail: I'm long travel so I have massive flex. Hill climbs are way more stable because of the long wheel base. The wider track is more stable too. I'm running 35s, soon to be 37s, so dips and rocks are less noticeable. I have wheeled with 4runners and tacos and they always struggle on stuff that is easy for me. I have full armor, skids, sliders, and bumpers. I sit pretty low, so I do scrape on harder stuff. Long wheelbase means I can high center on break overs too. Sometimes a little gas will get me over, but its a weakness
Desert trail: Of course being LT means I can bomb trail like you wouldn't believe. I have half the HP and half the wheel travel of a trophy truck and I only weigh about 1k lbs more. TT runs 39" wheels so I am close in that department too.
Of course, the tundra is a big fat pig. I sink in soft sand and mud so I have to be careful. Hopefully this year I will get gears and lockers which will help. Long wheelbase and track width means I struggle on tight trail. However, the are very few trails that stop me. I have done Steel Pass in Death Valley, the internet said I couldn't fit. The internet says I can't fit the The Squeeze on Pinion trail in Anza Borrego. I think I believe the internet on that one.
Absolute best part about the tundra is I can fit tons of gear and keep my weight low and centered. I carry RTT, two full size spares, 35 ga fuel and water, 3 batteries, firewood, 82q fridge, hot water system, full set of receovery equip (hi lift, shovel, axe, etc), misc gear/tools; all of that is below roof height and mostly between the axles