Ok, so I just spoke with a friend "in the know"... I'm not proclaiming that this is the gospel of oil, but I'll tell you what I was just told....
Its "Common knowledge" that the normal Plus50 0w40 was really Delvac 1. MSDS is from Esso, which is the Canadian brand of Exxon/Mobil....
The Plus50 II, now comes from Northland Oil. Northland is just a Bottler/Blender.... What I was told is Plus50 II is chemically the same as Plus50, He told me they still use the Delvac 1 Stock and Northland Bottles and Labels it for Deere....I guess depending on your location, you might have the "normal Plus50 Syn" bottled at Northland.
The new bottle and name is merely a Marketing gimmick...they needed to change the packaging to reflect the new oil certifications, so they labeled it as Plus50 II to create a consistent brand. The Dino Plus50 II IS a different animal though.
Pricing...Same price as the old stuff, YMMV...that really depends on your dealer.