Toyota, Land Rover, it makes no difference. I've driven a Range Rover in very difficult places. It had more miles on it's odometer than any two average Range Rovers on Discoweb. Combined. Every single inch of those miles was off road, after it was delivered, of course. You think your car is tough?
Drive it 400,000 miles, without ever touching pavement, on roads most in the US would consider medium to difficult trails.
But wait! There is more! HI! Billy Mays here, for Kennith having seen a Toyota accomplish that same feat of durability!
Oops. I've seen a Nissan do it as well. And I've seen newer Rovers in places you wouldn't believe, doing the same things. Let's not forget Subaru, either, or Mitsubishi. I've seen them all in places where the only other reminder of the civilized world was the occasional Coke bottle. I've even pinched myself and rubbed my eyes after seeing a Porsche in the middle of nowhere, doing things I most definitely would not recommend!
Both Land Rover and Toyota make vehicles that will cart you across the vast spaces of the world, but sometimes won't get you across town without an issue of some kind.
It comes down to what you are willing to put up with and where you are. In town, you bitch about every little shudder and warning lamp. Out there, if it isn't critical, forget it, cut the wires, disconnect it, clamp it, tape it, nail it, piss on it (sometimes IN it). It isn't needed, so you roll on.
Military forces use things for various reasons. Deciding what is better based on what military forces use is a good way to get bulky body armor that won't stop a bullet, batteries with a high failure rate, 8,000 pound failure prone dune buggies, tracked vehicles that don't know what they want to be, watches that break within a month, and camouflage that only works properly on the moon. It isn't always their fault. What they get isn't entirely their decision all the time.
There are many vehicles that are great for driving long distances off road. Land Rover makes a few of them, others make the rest. That's just the way it is.
One is not better than another one hundred percent of the time. Our "special" fighting forces use the vehicles they do for very specific reasons at times. Quite often, that reason is related to a facet of the vehicle's design that we would not give a single hoot* about, a reason that is entirely irrelevant unless you have certain gear or are part of a certain operation. Quite a few military vehicles were chosen for reasons like this.
When it comes down to it, to each his own. I just wish I could buy a Hilux over here. Uncle Sam isn't fair!
Cheers,
Kennith
*A "hoot" is a commonly used unit of shit-giving in the southern states, possibly developed to reduce the undesirable effects of literal interpretation. One "hoot" is roughly equal to 1.32 "shits".