What are the differences between Tom Coco's various coal shapes?

What are the differences between Tom Coco's various coal shapes?

Tom Coco "mini cube" coals offer a medium heat, versatile charcoal that can be used with both traditional foil and heat management devices (HMDs). The "cube" and "big cube" shapes offer slight increases in overall heat output and coal longevity than the mini cubes due to their larger size, however, may be too large for some hookah bowls or HMDs.