Comparison between the uncut R-rated VHS by Warner Home Video and the uncut PG-18 DVD by Laser Paradise (Unrated).

There are 39 differences, adding up to 2 minutes and 3.25 seconds:

25 cuts in the R-rated version = 1 minute and 27.75 seconds.
1 additional shot in the R-rated = + 2 seconds.
6 alternative cuts = 37.5 seconds.
7 alternative scenes = No time difference.

In the US, apart from the R-rated/theatrical version, the unrated version was released on VHS and DVD.

20 min.
The drug dealer is hit by the pellets and thrown back.
0.5 sec.

20 min.
The shot in Big Don's chest is missing.
0.5 sec.

20 min.
The shot in his back is not there, as well.
0.5 sec.

29 min.
Clarence absorbs two more blows by Drexl.
4 sec.

29 min.
Clarence, chokeholding Drexl, can be seen longer.
2 sec.

29 min.
Drexl hits Clarence in the face.
3 sec.

29 min.
Afterwards, Drexl kicks him in the off.
2.5 sec.

31 min.
The gory shot into Drexl's private parts is missing.
0.5 sec.

31 min.
Drexl, lying on the ground and wearing blood-soaked shorts, is seen longer.
0.5 sec.

31 min.
In the uncut version, one can see the bloody shot in Drexl's bodyguard.
0.5 sec.

31 min.
The shot of Clarence, bending over Drexl, is slightly longer.
1 sec.

31 min.
In the off, Clarence shoots Drexl once more. Only the gun is seen.
1 sec.

75 min.
One sees Clarence driving. There is a cross-fade into the hotel room. The mafioso turns Alabama, lying injured on the floor, over and sets her on her feet. Then he asks her, where the cocaine and Clarence were. Alabama only manages to say "Fuck yourself", causing him to hit her furiously in the belly. Alabama falls to the ground and gasps for air, while the mafioso asks her what was wrong and that she should get used to pain.
55 sec.

76 min.
After Alabama was hurled onto the table, one can see her blood-smeared face.
1 sec.

76 min.
In both versions, there are different shots of the mafioso pressing Alabama against the mirror and pulling her hair while threatening her.
R-Rated: +2 sec.
PG-18: 3.5 sec.

R-Rated	PG-18

76 min.
The mafioso faces Alabama and waits for her to answer him. However, when she remains silent, he slaps her in the face and pulls her hair. The R-rated version shows a side view of Alabama and the mafioso.
R-Rated: +3.5 sec.
PG-18: 15 sec.

R-Rated	PG-18

77 min.
A high-angle shot of Alabama regaining consciousness.
5.5 sec.

77 min.
The mafioso puts a cigarette in his mouth and lights it. The R-rated version shows a shot of Alabama's face and another shot of the mafioso lighting his cigarette.
No time difference

R-Rated	PG-18

77 min.
Alabama sees herself in the ceiling mirror.
3 sec.

81 min.
Another shot of Alabama, stabbing the mafioso in the back with the corkscrew.
1.5 sec.

81 min.
Alabama shoots all her bullets on the mafioso. When she is out of ammunition, she hits him with the shotgun several times and screams hysterically. The R-rated shows alternative shots.
R-Rated: +3 sec.
PG-18: 29 sec.

R-Rated

PG-18

81 min.
After Clarence has entered the room, both versions show differing shots of Alabama punching the dead mafioso's chest. Moreover, the R-rated version is missing the shot of Clarence standing at the door.
No time difference

R-Rated	PG-18

107 min.
In the R-rated version, there is no blood during the shooting of the director. In the unrated version, however, there is.
No time difference

R-Rated	PG-18

107 min.
Due to the zoomed image, one cannot see the gory penetrating wound in the director's back.
No time difference

R-Rated	PG-18

107 min.
The Cole's bloody bullet hole is missing.
0.5 sec.

107 min.
He receives some more shots.
0.25 sec.

107 min.
Yet another hit on Cody.
0.25 sec.

107 min.
When Cody hurtles backwards, the bullet holes in his body can be seen more clearly. In the R-rated version, the image has been zoomed, so that they are not visible here.
No time difference

R-Rated	PG-18

108 min.
During the shooting of Elliot, there are different shots in both versions.
No time difference

R-Rated	PG-18

108 min.
The shot Elliot collapses to the floor. In the background, another mafioso is shot.
2 sec.

108 min.
The shot man hurtles backwards.
1.5 sec.

108 min.
A gory shot is missing. Immediately after, a cop gets shot. As an alternative scene, the R-rated shows the shot of a pillow being shot in the hail of bullets.
0.25 sec.

108 min.
One of the baddies is shot.
2.5 sec.

109 min.
The mafioso is being wounded again.
0.5 sec.

109 min.
Dito. The R-rated version shows a more harmless shot of that.
R-Rated: +0.5 sec.
PG-18: 1 sec.

R-Rated	PG-18

109 min.
The wounded mafioso is lying on the ground. This scene is exclusive to the R-rated.
+2 sec.

110 min.
In the R-rated version, the mafioso is seen again. In the unrated version, one can see the cop standing next to the baddy longer.
No time difference

R-Rated	PG-18

110 min.
The shooting of the cops proceeds differently in both versions. In the R-rated version, the mafioso kills the cop. In the unrated one, Alabama does it.
R-Rated: +3 sec.
PG-18: 4 sec.

R-Rated	PG-18

110 min.
There are a few different shots of that in both versions. The R-rated shows the mafioso lowering his head and dying. Then, one can see Alabama crying. In the uncut version, one can see the shot cop longer and Alabama lowering her weapon.
R-Rated: +8 sec.
PG-18: 5 sec.

R-Rated	PG-18