Hi Matteo,
Model Data Editor enables you to inspect and edit data items in a list that you can sort, group, and filter. You can then configure properties and parameters, such as data types and dimensions, without having to locate the items in the block diagram.Whereas Model Explorer is used to view, modify, and add elements of Simulink models, State flow charts, and workspace variables, it lets you focus on specific elements (for example, blocks, signals, and properties) without navigating through the model or chart.
For more information, you can refer to the following documents-
