RE4 is currently unplayable thanks to Crapcoms inferior PS2 port.
There is no way to play the game with GameCube quality graphics and the extras from the PS2 version.
So wait for an eventual "definite version".
When you play the GC version you will go "ugh fuck I'm missing out on all these extras"
and when playing the PS2 version it's "omg no! It looks so much worse, and the fucking controls?!?! Nooo"