Here are some photos of some of Premier copies of Dinky Toys. The first photos show the Premier models by themselves, and then with the Dinky Toy that they were copied from.
The Premier Centurion Tank has a completely different turret from the Dinky, with the ability to fire "shells" through the barrel. It also has all the road wheels, which would have been nice to see on the Dinky.
The other models vary in detail from the Dinky Toy but are on the whole good copies.
I do not have an example of the Premier Austin Champ.