Both address isolation and support, but suit different needs and budgets.
Home sharing
Lower cost, more independence, and a single companion relationship — best if your main need is companionship and modest help, not care services.
Senior living
Higher cost, but built-in services, a larger community, and a clearer path if care needs increase over time.
Consider home sharing as a lower-commitment first step, with a transition to senior living planned for later if needs grow.