Overnight train from Xian to Shanghai

Hi

Is the overnight train from Xian to Shanghai as good as the Z train from Xian to Beijing?

I was thinking of taking the night train from Xian to Hangzhou or Suzhou before making my way back to Shanghai.

Or should I just fly?

thanks

Overnight train from Xian to Shanghai

T166/T163 is the fastest from Xi%26#39;an to Shanghai, depart at 21:02 and arrive Shanghai at 10:58

Xi%26#39;an to Hangzhou by over night train, I dont think it%26#39;s a good idea, depart at 22:42 arrive Hangzhou at 16:34

Xi%26#39;an to Suzhou the fastest overnight train, depart at 19:53 arrive Suzhou at 10:38

It really takes too much time by train, I will choose fly much faster %26amp; easier.