Who each tool is really for
Zoho
Zoho tends to suit companies solving more than one software problem at a time. If the same business also wants a help desk, campaign tooling or back-office applications, buying them from one vendor removes a set of integration and procurement headaches. The CRM is configurable enough to model unusual processes, which is valuable when your sales motion does not resemble the textbook.
Pipedrive
Pipedrive tends to suit sales teams whose only requirement is that deals move and nobody forgets a follow-up. The product is narrow on purpose, and that narrowness is the feature: fewer places for information to hide, fewer settings to argue about, and a board most reps understand in an afternoon.