Difference between type a and type b rat terriers?

Type A and Type B Rat Terriers refer to different classifications within the breed. Type A Rat Terriers are typically smaller, with a more refined appearance, and are often bred for companionship and show. Type B Rat Terriers are generally larger, more robust, and were originally bred for working purposes, including hunting and farming. The differences can also include variations in temperament and energy levels, with Type B often being more energetic and driven.