While it’s great to have those collections on Steam, those are the versions released a few years ago that I heard were hit-and-miss with modern OSes. The great thing about GOG is that they package everything together with the loader so you just have to install and go, and they make sure it all runs correctly.
And WHOA… I didn’t know about the EA thing. I’ve been busy lately, but I don’t know how I managed to miss that…