UiPath Add Data Row - How to Add DataRow to Another Datatable Using Invoke Method

Great Video!!
May I know the performance which is better add data row / invoke importRow method?

How would you add a list of Strings to a data table column (of type list<string>) ? The datatable has many other columns of type string, int & list<String>

Sir, how to add a row at the top of a sheet as a header?

Great video, well explained.