Im surprised no one has mentioned the fact that the jag has not matured yet. At 4-5 inches he is hardly a third of the size he will become. I know you don't want a fight, but IMO a full grown jag would destroy a full grown devil. If you want to bring out the aggression in any fish, give them a mate, let them spawn, and when the fry come, they will attack anything within reach, including your hand.
I vote Jag. (more colorful too)