They all do the same thing basically. Except multiman is updated frequently has the best support and has many more options than other backup managers. Go with Multiman.
PS3 Slim w/ Rebug Rex 4.30.2, 500GB Internal, 1TB/3TB External; PS2 Fat McBoot w/ Hard Drive; Windows 7 x64 Ultimate
Last game finished: The Last of Us | Currently Playing: Metro Last Light