The PC version is a much older release. GameSpy was a thing when it came out, I don't think it's a good benchmark for how this upcoming rerelease is going to be.
This is awesome, II was probably my most played game of that generation. It's too bad they didn't add 4 player splitscreen from the Xbox version as that's how I spent most of my time with this, but I'm not going to complain about a good thing and it's great they didn't remove splitscreen entirely like way too many new or remastered games.
Realistically though I can't see many situations I'd be able to get 3 other friends in the same room to play splitscreen and on the off chance I do I still have my original Xbox and disc with 4 working controllers.