The names mean nothing, it's all about the dye they use.
The latest ritek dye is ritekg.04, but there are different versions.
Do a search for what dye they use or use a program like dvdinfo to check what the use, if you can of course.....
If they all use the same version of the die, then just buy the cheapest, or for personal preference the ones that look the nicest to you
If you are talking about the + or - war, choose the format that is most compatable with your hardware.