Here's the specs on the Sergio Leone Anthology:

A Fistful of Dollars Collector’s Edition

Disc 1: Main Feature

* 2.35:1 Anamorphic Widescreen
* English DD5.1 Surround
* French and Spanish DD2.0 Surround
* English, French and Spanish subtitles
* Audio Commentary by Sir Christopher Frayling


Disc 2: Extra Features

* ”A New Kind of Hero” Featurette
* A Few Weeks in Spain - Clint Eastwood on the experience of making this film
* Cinqe Voci - Five friends remember Sergio Leone
* Not Ready for Primetime - Monte Hellman discussion on The Prologue Shot for the first TV release to legitimize The Man with No Name's amoral killing
* Additional Scene- The Network Prologue - with Harry Dean Stanton
* Location Comparisons - intercutting film clips with current footage of locations used
* Radio Spots - 10 Radio spots - audio only with texted video
* Trailer - Promotes both "Fistful of Dollars" and "For a Few Dollars More" in the same trailer

For A Few Dollars More Collector’s Edition

Disc 1: Main Feature

* 2.35:1 Anamorphic Widescreen
* English DD5.1 Surround
* French and Spanish DD2.0 Surround
* English, French and Spanish subtitles
* Audio Commentary by Sir Christopher Frayling


Disc 2: Extra Features

* A New Standard - Frayling on For a Few Dollars More
* Back for More - Clint Eastwood remembers For a Few Dollars More
* Tre Voci - Three friends remember Sergio Leone
* For a Few Dollars More: The Original American Release Version - focuses on alternate scenes/alternate releases
* Location Comparisons - intercutting film clips with current footage of locations used
* Radio Spots - 12 Radio spots - audio only with texted video
* Original Theatrical Trailer
* Trailer - Promotes both "Fistful of Dollars" and "For a Few Dollars More" in the same trailer

The Good, The Bad and The Ugly Collector’s Edition

Disc 1: Main Feature (179mins)

* 2.35:1 Anamorphic Widescreen
* English DD5.1 Surround
* English, French and Spanish subtitles
* Audio Commentary by Film Historian Richard Schickel


Disc 2: Extra Features

* “Leone’s West” - Retrospective making-of documentary featuring new interviews with cast and crew, including Clint Eastwood, and behind-the-scenes footage
* “The Leone Style” - Documentary on Sergio Leone and his impact on the spaghetti western film genre
* “The Man Who Lost the Civil War” - Historical documentary on the Civil War
* “Reconstructing The Good, the Bad and the Ugly” - Featurette which focuses on the process of reconstruction and talent audio re-recordings for the fully restored version of the film
* “Il Maestro: Ennio Morricone and The Good, the Bad and the Ugly” - Featurette on Composer Ennio Morricone featuring behind-the-scenes photos
* Extended Scene - A never-before-seen extended version of the "Tuco Torture" scene
* "The Socorro Sequence: A Reconstruction" - Three-minute animated sequence of a deleted scene
* French trailer - Includes film clips that were deleted from the final version of the film
* Poster Gallery - Features eight international theatrical posters
* Original theatrical trailer - Two-minute trailer as shown in theatres
* 4 Easter Eggs: “Uno, Due, Tre", "Italian Lunch", "New York Actor", "Gun In Holster"

Source: DVD Times