Thought this 'family' picture would be a good example of what to look for when trying to complete a collection or just add to knowledge of what's out there.
There's the yellow Ranger wildlife truck with the lion, a red flareside with canopy, a green kennel truck with four dogs and two 4x4s (that I know of). Between the chrome and white grills, plain and superfast wheels and even paint color, there are at least half a dozen distinct versions of both the kennel truck and the flareside. The wildlife truck was also reissued in white with zebra stripes down the sides.
As I'm in the midst of customizing a few, I stripped all four body types down. The 4x4 is on top followed by the wildlife truck, the kennel truck and the flareside. The kennel and flareside trucks have the nicest detail with lower side chrome and the hood peaks molded in whereas the 4x4 and wildlife trucks didn't.
The tail ends are even different; l-r flareside, wildlife, 4x4 and kennel. Looks like they didn't renew a licence from Ford or something on the 4x4. The chassis plate says 'mini truck 1981' and the letters are blocked out on the tailgate.
This shows all the grills used on them and in the bottom right is the reason I buy all the skanky red flaresides I find- for the interior and clear glass.