Whats better Groupmanager or Permissionsex?

I believe that group manager is better because its more easier than others! but i also have had some problems with group manager even know that i have had my fair share of Permissionsex. The problems i have had with group manager is that i will need to make perms for each world i don't know if there is a easier way to do that or what. But the problems with permissionsex is that when ever i restart or even reload the server it kicks me back to the default rank :( but if you can help with that i will look into switching back to my second favorite permissions plugin.