On the face of it a hair transplant is the same wherever you go. But this is far from reality. You are not buying the same make or model product and just comparing prices. The quality and execution of a hair transplant can differ greatly.
Hair loss causes an interruption in the normal phases of hair growth. This results in either temporary or permanent hair loss. How does a hair transplant know which is the permanent hair.
Donor management is important for both hair transplant techniques. The correct extraction should leave minimal changes to the donor area.
Technically every hair transplant may be performed in a similar manner. Hair characteristics vary from person to person as do expectations. Making every hair transplant unique.