What is the different I though both requires Lionel or Lionel-compatible O-42 or larger track curves since they are both AC6000 I own the one that requires O-42 or larger tracks
(1) In this AC600 Manual 73-8403-250 7/11
https://www.lionelsupport.com/...3250LEGACYAC6000.pdf
It says Your locomotive requires Lionel or Lionel-compatible O-42 or larger track curves.
(2) In this AC600 Manual 72-8298-250 10/08
https://www.lionelsupport.com/media/servicedocuments/57636728298250.pdf
It say Minimum curve: O-36