Well, VNs evolve frm time to time~
English translation scene is quite behind so when translation is done, another better version or title is already out in the jap scene~
For example, Chaos;head is good but Stein;Gates is an improved version, takes the flaws of Chaos;head and improved it. (story is different but some similarities)
Stein;Gates is like Ever17 and Chaos;Head. It improves on the lackluster pacing of Chaos;Head and fixes the unlikeable characters in Ever17 and thus more epic!!!!