Record of Agarest War Zero is shorter than the original, but if you connect this game to the first one's save file, or beat the game once, you get
access to a digest mode of
Record of Agarest War, where you can
replay the major plot points of the game plus «Extra mode» which ups the battle difficulty without changing the story.
It's noteworthy though that this second campaign also features several different endings to choose from, so as you can imagine, there's plenty of
replay value to be found in
Record Breaker, especially when New Game Plus offers various perks such as carrying over skills and demons, and
access to secret boss battles.