It's hard to say. They could be different people, or the same person listed as being at the hospital in Otter county, but also listed by his family member in Aitkin as being a household member. If you look at the MNHS, the mother's maiden names are close:
Death Certificate Index
Certificate Number: 1907-54-1238
Death: June 8, 1907
County of Death: Otter Tail County, Minnesota, United States
Subject: Death records
Type: Text, Government Record, Historical Records
Mother's Maiden Name: RASTO, Date of Birth: 1861, Place of Birth: Finland
Death Certificate Index
Certificate Number: 1907-51A-1830
Death: June 8, 1907
County of Death: Aitkin County, Minnesota, United States
Subject: Death records
Type: Text, Government Record, Historical Records
Mother's Maiden Name: RANTIO, Date of Birth: 1860, Place of Birth: Finland
The family could have filed a death certificate in their own county due to estate or benefit issues.
The death certificates from MNHS are $10, and can sometimes be sent via email. I've had pretty good response time from them.
Best of luck in your search!