DDD: aggregate embedding the root entity's properties or with a reference to root entity?

aggregate-with-root-entity.cs

// Aggregate has a reference to its root entity.
public class WebAppAggregate : Aggregate
{
	public Guid Id; // Aggregate Id.
	public WebAppEntity WebApp;
	
	public WebAppAggregate(Guid id, WebAppEntity webApp);
	
	public Result SomeInvariant(...);
}

public class WebAppEntity : Entity
{
	public Guid Id; // Entity Id.
	public string Name;
	public Url Url;
	
	public WebAppEntity(string name, Url url);
	
	public Result AnotherInvariant(...);
}

aggregate-with-root-properties.cs

// Aggregate embedding the root entity's properties.
public class WebAppAggregate : Aggregate
{
	public Guid Id;
	public string Name;
	public Url Url;
	
	public WebAppAggregate(Guid id, string name, Url url);
	
	public Result SomeInvariant(...);
	public Result AnotherInvariant(...);
}