All three products contain 100 mg of pure oleander. The Sutherlandia OPC also includes 200 mg of Sutherlandia frutescens, aka "The South Africa Cancer Bush". In addition to the oleander, Pao Laurel includes the plant Pao Pereira, which the late Dr. Swanepoel added to his suggested protocol because it strengthened the weak DNA carbon bonds that are characteristic of cancer cells.
It is my understanding that the owner and manager of the company, Dr. Swanepoel's daughter, has decided to consolidate and sell only the Sutherlandia OPC once exisiting stocks of the other two supplements are exhausted. I believe that they may continue to offer Pao Peieira as a seperate supplement (at http://www.sutherlandiaopc.com). You can find out more about Pao Pereira in this article I wrote that first appeared at The Truth About Cancer:
If you haven't already taken a look, here is a link to Dr. Swanepoel's recommended protocol, which he estimated was 95% effective against stage I and II cancers and 85% or more against stage III and IV: