The 8.25-16 XZLs were supplied to a local engineering firm here in my country for their mixed fleet of Land Cruiser 70 series single cab and troop carriers. As a consultant providing services to that firm, I was able to get a hold for a set. Never had a pleasant experience on those tires when mounted in a 40 series as it was too stiff no matter tire pressure you put on it on the safe tire pressure range recommended. Sold that set to a friend who owns an Isuzu Elf 4x4 single cab truck.The 7.50 O/R is also a mil spec tire, probably the main reason this size is still available.
But yes I can imagine that the 8.25+ sizes are quite stiffer, in Europe no 4wd would have that size from factory (and you can't legally change diameter). This is a heavy duty truck size, it's made for truck weighting at the bare minimum 4T. While the 7.50 was made for P4 and Defender, which match the weight of a 40.
The 7.50 is very flexible on the 40, really excellent traction. Its downsides are wet roads handling and noise at speed over 90-100kph but it improves with wear.
It used to be available in 235-85R16 with a 4 blocks pattern and it seems this variant had better on-road handling and noise but this variant is now long gone...