Here are some pictures for comparison of the tracks between the older King & Country vehicles and some of the newer models.
This is BBG001. This item was just retired.
This model is the BBA011 M10 Tank Destoyer. Notice that there is more detail in the track area. The tracks are molded separate which allows for a more realistic appearance.
As far as scale goes the WWII King & Country are supposed to be 1:30 scale. I read on another forum where a reader actually measured various models and made the calculations and for the most part they were accurate to 1:30 scale. Some have said that the figures with the vehicles are to small. I know that there have been complaints about some other figures; Major Stirling and Hasso von Mansteuffel being two examples. Major Stirling was tall, 6'5" I think I read and Mansteuffel was short so perhaps the figures were accurate.
Thanks
Ronnie