Who each tool is really for
Zoho
Zoho is generally chosen by teams that want a lot of business software from one vendor and want it running soon. The CRM sits inside a wider suite, so mail, help desk, campaigns and finance tooling stay under one commercial relationship. That appeals to founders and sales heads who would rather configure something themselves than commission a project.
Salesforce
Salesforce is generally chosen by organisations that treat CRM as a platform they will keep investing in. The expectation is custom objects, layered permissions, integrations with systems that were never designed to talk to each other, and a named administrator or partner who owns all of it. That is a strength when the business genuinely needs it and an overhead when it does not.