Compared are the shortened UK DVD by Marquee Pictures (BBFC 18) and the uncut German DVD by X-Rated.
Difference: footage with a length of 2 minutes and 47.5 seconds removed from 12 scenes is missing.
The shortened Version, released by Guilt Pathé on VHS and by Marquee Pictures on DVD), is based on the Standard Version. Later, Arrow released both versions: the uncut Standard Version and the uncut Extended Version. A comparison between the Standard Version and the Extended Version can be found here.
Missing shot of Alfredo playing with the razor in his mouth plus an intercut to Anna.
Alfredo gets the razor out of his mouth.
The stopping down and the black screen are shorter when Anna gets raped.
Alfredo holds the woman at gunpoint.
The shot in the face is also shorter. A very conspicuous cut btw. Shot of screaming Anna before the woman gets shot. Then the cut. In the next scene, Anna's face is blood-stained.
Alfredo looks at Anna through the bullet hole of the dead woman and starts laughing.
Anna's brothers are meeting her in town. In the next scene, they're sitting with her dad at the diner table. They argue, Anna gets upset and leaves the room. Then a shot of her lying in her bed thoughtfully.
Extended shot of the woman getting choked and raped. She finally gets hit in the face.
The killer holds the woman at gunpoint and pulls the trigger. When the bullet moves forward in slow motion, Alfredo's image reflects on the bullet.
Extended shot of screaming Anna while she's getting raped by Alfredo. Furthermore she gets hit in the face.
Alfredo strokes Anna's cheek with a razor in his hand. The shot of Alfredo is also missing for continuity reasons.
Anna hits Alfredo with the gun more often.