little differences with some tailgates
mini pickup #22 lesney england base, left model has extended braces around roof slot and different tail lights. raised part in the center of tailgate is larger
http://img339.imageshack.us/img339/3343/minipickup22tail1ai9.jpg
mini pickup #57 same applies to the left model
http://img47.imageshack.us/img47/2883/minipickup57tail1vi1.jpg
there is also a wheel well difference with both models.
http://img211.imageshack.us/img211/255/minipickupssfrontfen2il7.jpg
superfast #50 kennel truck, extended braces on the left model. also slightly different size letters and numbers.
http://img338.imageshack.us/img338/1742/kenneltruck50sftailyk2.jpg
hood line impressions from under the hood
http://img240.imageshack.us/img240/4532/kenneltruck50sfhoodlinett8.jpg
some of differences also show up with the #57sf wild life truck