Type B has deep and narrow underground tubes. Type B geysers eruptions are shorter than Type A and very wild. The Round Geyser at Yellowstone is like this. Type C geysers have tubes like Type A , but on the surface they are different. Type C geysers have pools of hot water at the their opening.
Type D has many underground pools of water coming off the main tube.
The eruptions of Type D are blasts of water with quiet periods in-between. Type E's opening is a pool of water bigger then Type C's and Type D's. It then has a very short tube that is narrow that leads to a wide, large pool of water. The eruptions of Type E's are like Type A because they are long and regular, but different in that Type E doesn't go as high because of the wide opening. It connects to a long narrow tube.