I test drove an older model 100 Land Cruiser, I don't rember the year, 98 or 99. It had a rear locker, which is not available on the newer models. I don't remeber the model year of the Sequoia, but it was a couple of years ago that I rented it.
When I test drove the Land Cruiser, I was suprised that it seemed much slower when accerlating than the Sequoia. Especially so as the Land Cruiser was empty, and when I drove the Sequoia the third row seats were removed and the entire back was filled just about to the ceiling with food, clothes, tools, and camping gear.
This is Just a single data point. Both vehicles visually appeared to be in good, well maintained condition. The Sequoia performed much better in acceleration. I would guess that the Sequoia was newer than the Land Cruiser. I have not driven any Land Cruiser newer than 1999 model.
I purchased an 80 in order to get front and rear lockers and solid axles. I knew I would be giving up both a smoother on road ride and some power for better off road capabilities. It also took me a long time to find a low mileage 80. There are plenty of low milage 100s available used. My choices were scarce low milage lockered 80, commonly available used 100s, or a new Sequoia. I expect used Sequoias are now common. I don't perfer their styling, but if your offroad is limited to larger and easier trails, they are a more economical alternative to a 100.
www.tundrasolutions.com would be a good place for you to get more feedback regarding the 4.7 V8s across the various product lines.