Different appearance colors and different product series.

1. Different appearance colors: The appearance of the Bull White socket is mainly white, and the overall appearance is simpler and cleaner. The appearance of the bull blue socket is mainly blue, with a distinctive color that is more eye-catching.

2. Different product series: Bull white socket is the main series of basic products of Bull brand, with simple functions and economical price. The Bull blue socket belongs to Bull's high-end series of products, with more functions and features, such as power detection, USB charging interface, etc., and the price is high.