The best practice to migrate from Zoho to SugarCRM is to use Skyvia. All you need is chose a predefined template for migration and start the process. Moreover, you can do your migration absolutely for free.
The most lightweight, fast, and save method I know is to use Data2CRM automated migration service.
You may switch a part of your real data from Zoho to SugarCRM by running Demo Migration for free.
Moreover, it is possible to run Demo Migration to Data2CRM's test SugarCRM. Means you don't have to be current SugarCRM user to see how your data looks within the platform.
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