The post office is on the other side of the station. 和 The post office is across from the station. 的差別在哪裡？如果不好說明，請提供一些例句。

Across from the station is more clear if the post office is not in the same building. Like if the post office was across the street from the station then it’s more correct to use “across from”

“Other side“ usually means that the two locations are in the same building

Example: “the store is on the other side of the mall”
This means the store is in the mall but just on the opposite end