There is a Italy DVD but not sure how legit.

Havard Film Archive has a 35mm restoration

Italy Plaion 4K Blu-ray

Italy Plaion 4K Blu-ray > Paramount 4K Blu-ray (marginally)

Italy Minerva DVD

Italy Minerva DVD:

Even though there is a RaroVideo Blu-ray, it has aggressive DNR and bad encoding so Minerva DVD is still visibly superior, see DVDBeaver caps.

While Minerva DVD has contrast boosting and black crush, it's still much superior to Britain Optimum DVD.

Pick your poison between Kino Lorber 4K Blu-ray or 2018 Olive Films/BFI or 2012 Olive Films/Italy Sinister Films Blu-ray

Kino Lorber 4K Blu-ray is of a new very flawed Paramount "restoration". This 4K restoration has frozen grain, sharpening and handles lesser materials oddly. The supposed non-Superscope version is false advertising. It merely reveals more picture information and lots of debris. Pick your poison between Kino Lorber 4K Blu-ray or 2018 Olive Films/BFI or 2012 Olive Films/Italy Sinister Films Blu-ray. The only video master that looks as good as it can for the respective format is the Criterion Collection CAV LaserDisc due to a lack of image processing.

1992 Republic Pictures LaserDisc PCM Mono BY FAR

Criterion LaserDisc has exclusive commentary. Olive Films Signature Blu-ray and BFI Blu-ray each have exclusive extras. Kino Lorber 4K Blu-ray has exclusive commentary.

Criterion DVD

Italy CG Entertainment Blu-ray

Radiance Blu-ray

Radiance Blu-ray

Italy Cecchi Gori DVD/Netherlands Homescreen DVD

Italy Medusa Blu-ray is the 4K resto but boosted contrast and colours. Still probably better than Criterion

France Pathé Blu-ray is the 4K resto and best encoding

Arrow 4K Blu-ray

Arrow 4K Blu-ray

Arrow's English mono is from the soundtrack negatives, with light noise reduction but still the highest quality anywhere. The main title is restored from the 1985 LaserDisc analog mono.

The 1985 CBS/Fox LaserDisc for untouched English mono despite element defects and an incomplete print used. The main title on this LaserDisc is the highest quality version known to exist.

The Arrow 5.1 is a careful upmix from their mono restoration to create a purist multichannel mix.

The Italy mono exists in lesser quality but Arrow performed additional restoration work to improve what they could.

Italy Rai Blu-ray

Arrow 4K Blu-ray

Arrow 4K Blu-ray > Kino Lorber, see caps https://slow.pics/c/P4E9uTHR

Arrow 4K Blu-ray for English dub, Kino Lorber 2017 Blu-ray for Italy dub

Italy Orizzonti DVD is likely a legit release

Britain Cult Films Blu-ray

2021 StudioCanal France Blu-ray has best encoding of the three (France/Britain/Italy) that use the 4K restoration

Italy DVD?

Italy Eagle Pictures 4K Blu-ray

Italy Eagle Pictures 4K Blu-ray > Paramount 4K Blu-ray

1994 Paramount LaserDisc

Criterion Blu-ray

Italy Plaion 4K Blu-ray

Criterion Blu-ray

US RaroVideo Blu-ray or Britain MoC Blu-ray, both OOP

US RaroVideo Blu-ray or Britain MoC Blu-ray has no discernible difference even though MoC has more bitrate, see caps Both OOP

Italy Eagle Pictures Blu-ray is also OOP, not English-friendly and has no caps for comparison.

2023 Eagle Pictures Italy 4K Blu-ray: color is fine

2023 Eagle Pictures Italy 4K Blu-ray: color is fine

BFI Blu-ray

Italy CG Entertainment Blu-ray is 4K resto, but horrible colours. 2019 BFI Blu-ray is the older master but better encode + extra footage than Criterion

Theatrical: Italy Eagle Pictures 4K Blu-rayRedux: Lionsgate vs Eagle Pictures?Final: Lionsgate or Eagle Pictures

Theatrical Cut: Italy Eagle Pictures 4K Blu-ray > US Lionsgate 4K Blu-rayRedux Cut: Lionsgate vs Eagle Pictures?Final Cut: Lionsgate or Eagle Pictures, both are not great (visible chroma noise)

Theatrical: Germany 4K Blu-ray/US Blu-ray DD 5.1 (1979 mix)

In the Lionsgate US/UK 6-disc set, there are 4 discs of the main feature. For whatever reason, the 4K discs lack the *original track. The Germany 4K Blu-ray release is different on this matter.

UBD: Final Cut: Atmos, DD2.0

UBD: Redux/Theatrical: Atmos

BD: Final Cut: Atmos, DD2.0

BD: Redux/Theatrical: Dtru5.1 (Redux mix?), DD5.1 (?), DD5.1 (Theatrical only), DD2.0 (downmix??)

As a result the Theatrical Cut has 4 tracks, The Redux has 3. Differences are unclear.

BD: Hearts of Darkness

BD: Special Features

Criterion Blu-ray

Netherlands Lumière Blu-ray is best, but all releases of the 2K restoration have issues:

Criterion Blu-ray/Germany Filmjuwelen Blu-ray have yellow tint on sepia scenes

France Potemkine (Standalone) has raised blacks and poor encoding

France Potemkine (Boxset) has orange tint on sepia scenes and poor encoding

Netherlands Lumière has correct sepia scenes, good encode, but gamma is slightly off.

Italy General Video Recording has correct sepia scenes but gamma is off (more so than Netherlands Blu-ray and worse encode)

Arrow 4K Blu-ray

Arrow 4K Blu-ray is is a bit stronger than the very good Blue Underground The differences in the body of the film are negligible, but Arrow does have all three main credit sequences (Zombi 2, Zombie Flesh Eaters, and Zombie) that play in 4K via seamless branching. They also un-stabilized the handheld shot in the Zombie closing credits that Blue Underground had stabilized when they added new digital titles. It's back to looking properly handheld.

Arrow 4K Blu-ray > Blue Underground 4K Blu-ray, "has the original Italy mono - think someone said earlier that the Blue Underground was a downmix on that track and the Arrow is corrected"