Conventionally, I've seen the split as:
- CRPGs are "Western" RPGs, often based in character class based and sandbox gameplay. If there is a story, it will have many twists and branches, and while the party may have pre-set characters, the protagonist is a blank slate that the player writes.
-JRPGs have a very linear story and though there is a lot of dialogue, the player has almost no input into the flow of the story beyond the rare "yes" or "no" prompt. Class restrictions are rare and flexible.