on the other hand = 換句話說; a different story = 另當別論
電影 The War With Grandpa, 2020 #阿公當家 精彩例句:
****************************************
Is he gonna be okay?
他會沒事吧?
He'll be fine. You and Mia, on the other hand, that's a different story.
他會沒事的。你和Mia, 換句話說, 又另當別論了。
************************************