whats the difference between chain and re:chain of memories is there like more stuff????

there really no difference between chain and re:chain of memories.

the only things is that chain of memories is to Gameboy advance and re:chain of memories is to PS2

Re:Com got some new bosses like a third Marluxia battle, and theres many other changes too or new stuffs added.

 

And Re:Com is also in 3D, but you properly knew that already...

There is also some more map card stuff in reCoM like the wild joker.In reCoM , you also get to fight Zexion.

alright, im evidentally going to say some stuff already said, and some stuff that is totally obvious, but hey, you asked for it, haha,

 

alright, first off, lots more voiced cutscenes, in fact, i dont even think there were any voiced cutscenes in the original, two extra boss fights, marluxia's final battle was split into two battles, one on the weird cape, and on the ground, and instead of attacking marluxia the whole time, with the options of attacking his sythes for extra hp (during this, he has one extra move that 'if not blocked,' will deny visibility of your cards), in the first battle you attack the main frame of the ship he is on, then in the second part of the battle, you directly attack him while he is immobile, but a large demon like version of him is standing behind him with a magnificently increased sythe, in vexen's second fight during sora's story, he has an extra sleight, i cant remember what it is called, but a large amount of ice is added to his shield, resembling a very long sword, which he swings around at you, and if i can recall, creates shockwaves on contact with the ground, axel and larxene also have new or improved sleights, either in all battles or in their final battles, lexeaus can enter a state of invunerability similar to what he could do in his data battle in kh2finalmix+, zexion is fightable in this game, and instead of repliku killing zexion, he absorbs him, a line of axel is changed, the ability of the darkball card is changed, due to there no longer being a competitive mode as in the gba version, and sora no longer has access to the card, since it's ability is directed at riku's card duel ability, which is a new feature of the game, being activated upon riku and an enemy presenting a matching card value, causing a duel between him and the enemy where he will have to present a card value the same or higher than the card the enemy shows, and the amount of cards he will have to match are based on the difficulty of the enemy, winning the duel will present riku with a powerful sleight, loosing the duel will cause riku to be stunned until hit, riku has two knew sleights with the king, where he and the king get back to back and shoot orbs of energy in straight lines (in dark mode, riku's orbs can inflict confusion), after beating rikus story, certain keyblades from kh2 and enemy cards of the organization can be obtained in the reward rooms, some sleights are no longer available to sora like blazing donald and homing fira (it is already homing), but new ones are introduced such as a sleight where time is stopped and sora rapidly attacks the nearest enemy (which i believe is used by pairing stop/attackcard/attackcard, but must be unlocked in some way), there are also new map cards such as eternal darkness, which is a large, flat room consisting of nothing but shadows, and the only things visible is yourself, the heartless that pop up, and the doors, no other objects can be found in the room, and upon 100% completion of the game, two 'enemy' cards can be obtained, one of which can give the user unlimited health, the other, i am not sure of

 

and i believe that is it, that was really long, and probably won't be easy to read through, so yeah, i hope that helps

Re Chain of Memories have more bosses Ex: Zexion (Riku's Story) Marluxia 3rd boss (Sora's story) More sleights Ex: Letheral Flame, Holy Burst Fiagra Burst Better Graphics bcuz it is on the PS2 more voiced actors

you can read them here

http://kh13.com/games/com.php