What are the visible differences between the Bachmann N&W Class J #611 "railfan" version and their N&W Class J #613?

https://shop.bachmanntrains.com/index.php?main_page=product_info&products_id=6681

https://shop.bachmanntrains.com/index.php?main_page=product_info&products_id=6682

Here is an image of the engineer's side of the Alco 2-6-0 model:
http://www.pbase.com/tracktime/image/136311296/large

Here is an image of the engineer's side of GBW 2-6-0 #56 (later #256) built by Alco (Schenectady) November 1924:
http://www.greenbayroute.com/56build3.jpg