FF4 (known as ff2 US version), was my favorite ff game on the nintendo. The new version shown here with cgi I haven't played but I'm tempted to grab it. If you are going to grab any of them make it this one.
You may wanna reconsider.
The 3D version of final fantasy 4 changes some game mechanics, and its even tougher than the SNES japanese FF4.
They added an Augment system which is basically a messed up version of Materia. Its a pain to arrange what you want, you'd have to plan everything before you even start the game. If you mess up, you miss good Augments until you win and start another game again. And if you ignore the Augments entirely, the game is a little too tough.
Also theres some minor annoyances like you cant use an equipped weapon as an item (Dancing Dagger, Flame Rod) unless you waste a good command slot in the status screen. And if you were to change over to an Ice Rod, you would not be able to use it at all (weapon or item) until the battle was over and you go back & change the command again.
The good news is its easier to control than the Android port and they included the high quality FMV from the DS version.
Downside is battles are limited to 15 FPS. Thats because its actually a remake of the Android version and not the DS version.
I still think the 2D versions are better for gameplay, either the translated SNES ROM, or the GBA cartridge.