Motor Admin has a simple unified Admin UI without the need of actually building the UIs unlike in Retool WYSIWYG.
The versatility of Motor Admin can be achieved via in-app UI configurations, custom forms, reports, and dashboards.
Btw, here is a short demo: https://www.youtube.com/watch?v=ZD4Six8ZEP8
Also, Motor Admin has a simple self-hosted deployment option.
Also, Motor Admin open-source version has powerful business intelligence features with custom SQL reports, BI dashboards with variables and fields, and automated email reports.
Also Motor Admin's UI is optimized on mobile and the UI is faster in general.
In terms of available features open-source, self-hosted Motor Admin could become a much better option than ForestAdmin SaaS for an admin interface.