What's the difference between standard room A and standard room B?

Standard Room A and Standard Room B are both big beds and small beds, but some stores have different prices due to the differences in the area of different standard rooms or other room types such as windows. Generally, the price of type A is slightly higher than that of type B, which means that the standard room of type A is more comfortable than that of type B, but the design and facilities of the room are the same. The size of the two beds of Jinjiang Inn is not a standard room, but a double room, which is the difference between Jinjiang Inn and other hotels.