Later's current product materials describe a workflow that moves through planning, approvals, publishing, engagement, and analytics. That can be useful for teams wanting one social management environment around a content calendar and multiple channels.
Somea is relevant when the team's first question is not 'when should we publish this?' but 'what do we already have that could become the post?'. It connects supported asset folders, indexes brand-owned visual material, helps people search by meaning, and keeps the selected source connected through editorial direction and human review.
For visual brands, the difference matters because the cost of social work can sit in retrieval and reuse rather than in the final scheduling step. The correct alternative depends on whether you need a broader social suite or a deeper bridge between your photobank and the content workflow.