How to split systems between two scenes?

I want to compare the performance of regular Unity and DOTS using the same operations, such as mesh generation, as an example. To do this, I created two identical scenes, on one of which the mesh is generated in the old way, and on the other the same mesh is generated using DOTS. But a problem arose that on the scene where the old method is used, the SystemBase logic is launched and two meshes are generated at once. How can I make SystemBase work only on a certain scene? Use multiple worlds? Can anyone share examples of such division?

You can set your SystemBase in OnCreate disabled
Once you need to run it just enable it for one frame

I need this SystemBase not to start at all in a scene where I am not using DOTS.

In that case, you can use the DisableAutoCreation attribute. Then in the scene where you want the system to exists (and run), have a MonoBehaviour that manually creates the scene in the default world.

[EDIT]
You’ll also need @boyaregames 's suggestion. It’s safer for tests and experiments to manually control a system’s execution.
[/EDIT]