i think it is, if its not the only thing that changes is the amount of fan art on the gallery.
there are two endings, what defines how you get then is the amount of "corruption" you have after beating the final boss, you can check the amount of corrpution in the main menu on the bottlom left or bottom righ. Also you can choose the "evil" path and still get the good ending since, getting corrputed by bosses and corrupting all npcs you encounter does not raise your corruption level anough to get the bad ending ( or like the game describes it, the best ending).