What is the difference between Provider and Scoped Model in Flutter?

Provider is a flexible dependency injection framework based on InheritedWidget, but more abstract and easier to use. It allows managing state across different parts of the widget tree and facilitates reuse of business logic.

Scoped Model is also based on InheritedModel and is designed for application state management. It uses the Model-View-ViewModel (MVVM) pattern and provides ScopedModel as a model class containing data and logic, and ScopedModelDescendant to access this data in the UI.

Key differences:

Criterion	Provider	Scoped Model
Flexibility	High, suitable for various scenarios.	Less flexible, more oriented towards MVVM.
State management	Can manage any type of state.	Focused on using ScopedModel subclasses as data sources.
Dependencies	Easy to inject various dependencies.	Mainly oriented towards ScopedModel as a data source.
Size	Less code for simple cases.	Requires defining a ScopedModel class.
Updates	More granular updates than the basic InheritedWidget.	Updates widgets when notifyListeners is called.
Extensibility	Easily combined with other packages.	Less adaptable for combination.

Provider is considered a more modern and preferred approach due to its flexibility and convenience.