As the older population increases, the number of persons living with dementia (PWD) will increase as well. Yet, at the same time, there are fewer health care professionals per care recipient. To address the rising demand on healthcare professionals and informal care partners of PWD, socially assistive robots (SARs) can potentially facilitate care provision. It is crucial to understand the divergent tasks of these two caregiver groups so that the SAR's intervention can meet each group's needs. This qualitative study investigated and compared both caregiver groups' acceptance of a SAR. Six use cases involving a SAR (NAO, SoftBank) were demonstrated to both caregiver groups (N=20 persons). Both groups expressed willingness to adopt such technology and found that it could be useful in dementia care. However, participants' perceptions varied by task. Results indicate that healthcare professionals focused more on the assistive aspects, whereas care partners focused more on the social aspects of the SAR.