Difference between Crossfire NA, PH and Combat Arms

I have two different questions to ask.

What is the difference between Crossfire NA and PH? For example, which is easier to hack, which has less protection and stuff like that.

Also, which is easier to make hacks for Combat Arms or Crossfire?


Im asking these because I play Crossfire NA and have tried at making hacks. I succeed but then the updates come. I want to know which is the easiest to hack, so I can practice my hacks on those games...and learn. Then come back to Crossfire NA and use my knowledge.

Any help would be appreciated.

CF NA For All Player
CF PH It's For Asianz Palyer
CA I Don't Play It
============> If Wrong Sorry