From the comments of that article:

The new version doesn’t have the blue 70mm TWC logo, Cinerama logo, overture, intermission, and the entr’acte (with the Crystal Gayle song).

Instead, there’s a recap in the beginning of 2~4 parts, showing a scene from the previous part. The Jesus cross opening titles and closing credits are shown in all 4 parts.

…

This version contains the chicken plucking scene from the 70mm roadshow, but contains the regular multiplex version of the Daisy guitar scene with the crank shot in the beginning.
What surprised me the most was that there’s an entirely new footage that I have never seen before, during the Channing Tatum flashback section. It’s not even in 70mm and regular versions.

And:

This “extended cut” never played in theaters. The roadshow had an overture, the use of the Crystal Gayle song “Ready for the Times to Get Better” and Daisy Domergue playing the guitar was in one uninterrupted take (none of which are in this). What this is is something entirely different.