If you say that there is afinelinebetween one thing and another, youmeanthat they are verysimilar. You often say this when one thing isacceptableand the other is not:
（两者）有所不同
As aparent, Iknewthat there was afinelinebetweenpanicandcaution.作为家长，我知道惊慌和谨慎有所不同。