Answer:
Rolfing is a type of bodywork just like massage is a type of bodywork. Some would say that Rolfing is a form of massage but there isn't any clear definitions of massage and bodywork.
Rolfing is a systematic method of working with the body for the purpose of realigning the body to relieve the stress points that can lead to pain and injuries.
Massage can be Swedish Massage, Triggerpoint massage, thai massage, etc