I think you are asking about the difference between WHMCS and shared WHMCS. WHMCS is a software that helps web hosting providers manage their clients, billing, and automation. Shared WHMCS is a service that allows you to use a licensed WHMCS software on a shared server with other users. Some providers offer shared WHMCS at a lower price than buying your own license from WHMCS Limited.
However, there are some drawbacks of using shared WHMCS. You may not have full control over your data and security, as you are sharing the server with other users. You may also face issues with performance, reliability, and customization, as you are dependent on the provider’s server configuration and updates. You may also violate the terms of service of WHMCS Limited if you use an unauthorized or illegal shared license.
Therefore, I would recommend you to use your own licensed WHMCS software if you want to have more flexibility and security for your web hosting business. You can buy a license from WHMCS Limited or from an authorized reseller. You can also look for alternative billing software that may suit your needs better.