In the same boat → 同舟共济、同样的情况

In the same boat (phrase) - be in the same circumstances as others.

同义词: in the same situation, under the same circumstances

We're all in the same boat. → 我们都在同舟共济。                      

We're not in the same boat because I have it worse. → 我们不在同样的情况，因为我的情况更糟。