The main medical justification for whole body is to preserve the parts of the nervous system (and any other information-encoding tissues) that are not in the brain, for any additional fidelity that may add when reconstructing the personality. Transplantable organs might not be valued for this purpose as highly as the gut and spinal column, so there is room for a spectrum of preferences here.
Whole body is more in line with “cryonics as medical procedure”. In this view, cryonics and organ donation are mutually exclusive.
The main medical justification for whole body is to preserve the parts of the nervous system (and any other information-encoding tissues) that are not in the brain, for any additional fidelity that may add when reconstructing the personality. Transplantable organs might not be valued for this purpose as highly as the gut and spinal column, so there is room for a spectrum of preferences here.