I understand what you are saying. Something else to consider is that even tires of the same "size" are not always the same diameter...some in say, size 265/75-16 can be almost an inch taller than others that are also 265/75-16...I've seen four tires of the same 265/75-16 size sitting side by side and there was about an inch difference in height from the tallest to the shortest.
Looking at different tires is fun and interesting, but after a while I've concluded that there's a boxful of lugs/tread blocks somewhere, and makers just pull however many shapes they need out of the box and put them together in whatever combo they want for a tire tread design. No tires are much different to look at than any of the others, within types.
