The nice thing about step testing is it finds out the 'best' values for the entire table in one session.
Auto-learning only 'fills' the cells in the table the engine has just used.

Similar:
https://www.youtube.com/watch?v=35bZTekQGE8&list=LLtrx_z3PXNJYuLEui9O-hkg&t=0s&index=9