ijjiGunZ iGunZ
ijjiGunZ - You can find 10000 people at a time playing the game.
iGunZ - Less than 500 people playing it, and that's if you can manage to get into the server.
ijjiGunZ - Has a publisher. Meaning that like kGunZ, jgunZ, bGunZ and inGunZ it will be part of new updates and improvements in the game. These updates have already been seen through the likes of the Clan War Server, the Quest server, the Rankings system both individual and Clan and the Premium Cash Shop. Also, more updates are planned (MAEIT Official Website Announcement). In the future we can expect Classic Mode, Classic Mode Team Death Match and Ladder Mode. Less lag for all (North Americans mainly, but improved ping for all I suppose)
iGunZ - Has no Publisher and is therefore a low priority for MAEIT. They care about iGunZ, don't worry about that. But they have to manage all the other versions of GunZ as well and unfortunately iGunZ is last on their list. This is because from the other versions they can receive revenues and profits from the Publisher through the Cash Shop System. Also, it would be in MAEIT's best interests to be concentrating on a large and growing community rather than an old and dying one. Also, having no Publisher means that iGunZ will not be receiving the same updates as kGunZ, jGunZ, bGunZ or inGunZ. These lack of updates will eventually make the player grow bored of the game because of limited activities. That is if he hasn't already gotten bored of trying to log into the game. iGunZ due to hackers has increased lag. Not to mention greater distance ping (We all know how North Americans like to complain on this issue)
ijjiGunZ - Lots of players to interact with, lots of rooms, lots of Clans.
iGunZ - Hardly any players, limited choice of rooms to enter, lots of random Clans which are not worth joining.
As you see from the reasoning above there are many reasons that can be given which support the theory that ijjiGunZ is better than iGunZ. That is my own personal opinion but you are also welcome to your own.