"[wrong if] it looks like the original"

Actually that is not correct. The court is going to look for clear originality, not if the copy is recognizable or not. By the way, a copyright infringement is not a crime, the original author can only sue for damages, an injunction against the publication. If the court rules against you, you may end up paying your opponents court costs so if you are just a bit unsure, it is better to be generous.