I don't know...maybe if i lived somewhere else i agree. Here, regular gas is freaking cheap these days! Way cheaper than diesel.
Gasoline stations ALWAYS carry gasoline, no matter where you're at...old towns in the middle of nowhere to city. Gasoline stations SOMETIMES carry diesel...and this becomes more rare as you go away from cities and main highways.
Diesel may have great torque, but the TLC200 V8 isn't that anemic and provides great all-around performance, whether on highway (smoothness & passing) or on the trail (with low-range). I am not sure that i would say the same about diesel.
I am outdated i am sure, but the last diesel i read about on Toyotas overseas was not that great nor powerful.
Like I said, I've driven the gas 200 series Landcruiser and LX570 fairly extensively, trying to decide if I wanted to buy either from my Sister and BIL. I've also driven the LHD LC200 with the twin-turbo Diesel, when overseas.
The difference in real world fuel economy between gas and diesel in my driving experience, is around 10 mpg better for the Diesel. Not to mention the superior low-end and mid-range power of the Diesel. If you keep the gas version floored, it does make more power once it's revved up above 4k rpm. But I don't consider a heavy SUV to be a race car, so in normal driving I don't treat them as such.
Out of curiosity I found that the Diesel Landcruiser will top 120 mph on the Autobahn. Which is fast enough for that tank, IMO.
If you just want to go fast, there are much better options than a Landcruiser.
The fact that gas is more readily available when in town here in the States, doesn't matter when you're exploring on a desolate dirt road, 100 miles from the nearest gas station, and down to less than a 1/4 tank. With the gas version I'd have to haul extra cans of gas just to get back to a gas station. With the Diesel, I could drive much farther, without having to resort to carrying extra cans of fuel.
What I'm saying is that the range per tank is what matters most to me if I were to buy a Landcruiser, not the cost of fuel per gallon. If fuel cost is your primary consideration, a Landcruiser is not the vehicle to buy, in any form.
Having driven both, and for what I would want it for, the Diesel version is better, IMO.
But in the States which is better is irrelevant. You can only get the gas 3UR-FE here. Which is enough of a reason for me not to buy one.