Guilty of Romance exists in two very different versions. The one that's approx. 30 minutes shorter aka the "International Version" plus a longer one called "Japanese Extended Version". Mainly with regard to the running time of the two previous movies, most reviews refer to the shorter version as adapted for Western regions when it comes to content and performance. Shion Sono on the other hand has often emphasized that this version is his prefered one; the Director's Cut so to speak. And if you examine it carefully, you'll probably come to the conclusion that it makes perfect sense.
Mainly, the Extended Version contains extended scenes that elaborate the yet very clear storyelements more detailed. Furthermore, the character of the female cop Kazuko Yoshida has much more screentime here, the audience gets to know her better. The Extended Version deals with her free-spirited sexuality in terms of cheating on her husband. A detailed comparison between both versions with pictures can be found here.