If you're using Dashboard Customizer to build awesome dashboard interfaces, use Grid Controls to position admin widgets as grid children:
No. While the result is similar, the process is vastly different.
Core provides pre-determined class names and hierarchy - much like Bootstrap - which requires setup and adds to the learning curve. There are many different class names to memorize throughout a complex hierarchy that can be used together to achieve the result you want. See for yourself from their documentation.
In contrast, Grid Controls adds standard Oxygen controls in standard Oxygen panels. This allows you to decide for yourself where and how to apply grid settings. Whether that's on ID, class, pseudo, or media break point is up to you. Further, you can be as specific as you'd like to be. There are no limitations.