Clay, now Mesh, is useful when your contacts are scattered across tools. It brings them together and automatically enriches their profiles. You can browse groups, search the directory, and catch up on life updates before reconnecting. Those details give you a fuller picture of a large network.
A rich directory gives you plenty to explore. You still have to choose which relationships to spend time on. Tenora starts with the smaller circle you have chosen to maintain. Its orbit shows closeness and urgency together, and it opens to the highest-priority relationship.
TLDR
Use Mesh if you want to bring a large network together and explore richer profiles.
Use Tenora if you want a smaller circle in view, with the next relationship to act on already prioritized.