Kodak Ektacolor SP vs RT Dev Replenisher

[pwadoc]

Hey all, I recently tried to acquire some of the Ektacolor RT dev replenisher I had been using (10L kit), only to find that it was backordered pretty much everywhere. However, I was able to pick up some Ektacolor SP, which the documentation indicates is intended for use in mini-labs. I did a search here to see if anyone had posted any in-depth information about the difference between these two, but I could only find a thread indicating that it worked OK for tray developement. From what I can see, the only major difference is that the SP version comes in a single bottle, vs 3 bottles for the RT. Does anyone know what the technical difference between these two is?