As I said, all *OTHER* specs (audio, subs, extras. etc.) are identical for all four films.
TREMORS 1 (1:35:40)
R1 America - Universal Pictures (Attack Pack Re-Release)
Extras:
Outtakes (5:13)
Featurette (3:59)
2 Theatrical Trailers (4:04)
Kevin Bacon Profile (3:02)
Michael Gross Profile (2:29)
Reba McEntire Profile (2:03)
Production Photographs (6:48) (113 images/chapters)
Bonus Trailer:
- "Tremors 2: Aftershocks" (2:03)
Subtitles: English HoH and Spanish
Aspect Ratio: 1.85:1
Picture Format: Anamorphic
TV System: NTSC
Soundtrack(s): English Dolby Digital 5.1, French Dolby Digital 2.0 Surround, Spanish Dolby Digital 2.0 Surround
Case type: 2-Disc Keep Case
Notes: Two single-sided discs (2 films per disc)
http://www.dvdcompare.net/comparisons/film.php?fid=757TREMORS 2 (1:39:30)
R1 America - Universal Pictures (Attack Pack Re-Release)
Extras: Theatrical Trailer (1:53)
Subtitles: English HoH and Spanish
Aspect Ratio: 1.85:1
Picture Format: Anamorphic
TV System: NTSC
Soundtrack(s): English Dolby Digital 2.0 Surround, French Dolby Digital 2.0 Surround, Spanish Dolby Digital 2.0 Surround
Case type: 2-Disc Keep Case
Notes: Two single-sided discs (2 films per disc)
http://www.dvdcompare.net/comparisons/film.php?fid=2816TREMORS 3 (1:43:30)
R1 America - Universal Pictures (Attack Pack Re-Release)
Extras: "Spotlight On Location" featurette (14:45), Theatrical Trailer (1:15), Bonus Trailers for "Tremors" (1:53) and "Tremors 2: Aftershocks" (1:53)
Subtitles: English and French
Aspect Ratio: 1.85:1
Picture Format: Anamorphic
TV System: NTSC
Soundtrack(s): Dolby Digital 5.1 English
Case type: 2-Disc Keep Case
Notes: Two single-sided discs (2 films per disc)
http://www.dvdcompare.net/comparisons/film.php?fid=2817TREMORS 4 (1:40:55)
R1 America - Universal Pictures (Attack Pack Re-Release)
Commentaries: Audio commentary from director S.S. Wilson
Extras: "You're On The Set of Tremors 4: The Legend Begins" featurette (12:05)
Subtitles: English HoH, French and Spanish
Aspect Ratio: 1.85:1
Picture Format: Anamorphic
TV System: NTSC
Soundtrack(s): English Dolby Digital 5.1
Case type: 2-Disc Keep Case
Notes: Two single-sided discs (2 films per disc)
http://www.dvdcompare.net/comparisons/film.php?fid=8473