How does the re-release of FF VII differ from the original PC game?

The game requires Internet connection during the initial setup because of its DRM. After that, you can play offline if you wish. However, the way the game is programmed is that it always checks for connection and attempts to sync the save files to the cloud servers first. If it cannot find the connection, then it gives you the option to save locally.

It is a pain sometimes since a lot of times it would have problems connecting to their cloud server even though there is an internet connection. Many people have reported the "fail to sync" problem in game forums. Their cloud server is not very reliable for some reason.

The game still has a few bugs, but at least it does not crash on modern computers like the old one does (the old one runs on directx 5). The 3D graphics is cleaned up a bit and looks nice.