BricsCAD is available as a single installer in six license levels: Classic, Pro, Platinum, BIM, Mechanical and Ultimate. The 30 day trial license allows to use BricsCAD at the Ultimate license level.
While in trial mode you can use the RunAsLevel command to change the behavior of BricsCAD. Changing the license level allows you to experience each of the license options during your trial period! You can try as much, or as little, BricsCAD functionality as you want without having to install or uninstall additional software.
The BricsCAD vs. AutoCAD feature comparison chart gives you an overview of the availability of features in the different BricsCAD license levels, compared to AutoCAD.