The ability to change the game's ending is also noted, especially given its short six to eight hour play through. Because Harry clearly has some mental issues, it's not abnormal that he talks to a shrink. Your responses can change the game's outcome, but nothing so monumental to make you feel rewarded for a repeat performance.
Thus, in contrary to the old maxim, something new is old again. Keep your expectations firmly grounded if you wish to dive into Shattered Memories' icy waters.