My $0.02. Sequoias are great vehicles for their intended market. It was designed specifically for the US market to compete against the Tahoe and Expedition, and it did so well. They're BIG, significantly bigger than contemporary Land Cruisers and feel bigger. I think they make great road trip vehicles and -when properly modified- do well on trails that can handle a vehicle of those dimensions. Like the Tundra, I think the current Sequoias are looking pretty dated vs. their competitors (in particular the watered-down Nissan Patrol sold in the US as the Nissan Armada and the Infiniti whatever).
The Land Cruiser is a totally different animal. It's a global platform, designed for the "roads" of Pakistan, the extreme conditions of Australia, Africa and South America. Most components are over-built, designed to last a long time, and in many cases over-engineered even for the expected use. This is also why Land Cruisers are SO expensive, they don't usually share platform or many components with other Toyota vehicles produced at scale. They're built in small batches to exacting levels and with less automation than other platforms.