Reasonable question to me marra, so happy to help you out here.
Nothing has been cut out of single player in the PC version. All the levels and cut scenes are intact. It does not have the extra unlockable movies like the PS3 version but if you have the Blu-Ray of the movie you are not going to miss them.
Graphics wise, as long as you as you have a gaming rig PC, its the best of the three.
Obviously the multiplayer was taken out on the PC which sucks. Having fun with MP on XBL but still would have been nice to have to choice to play MP on a PC too.
As far as controls are concerned I would give the keyboard/mouse combo a try just in case you do find it better than a pad. Although I tried it and while the classic FPS aiming and shooting superiority was still there, the mouse was quite awkward when it came to slamming ghosts.
Individuals have made small bits of software to make PS3 pads work on a PC but I have not tried them as I do not have a PS3 pad to test so I'm sure the software will make the pad recognisable to Windows but can't confirm if GB:TVG will recognise it.
However X-Box 360 controllers are fully supported by the game. If you have a wired 360 controller, just plug it into an available PC USB socket, possibly need a quick driver download from MS and your good to go.
If you are like me though and only have wireless 360 pads, you'll need one of these plugged into a PC USB socket.
http://www.amazon.com/Xbox-Wireless-Gaming-Receiver-Windows-Pc/dp/B000HZFCT2Pricy, but works great.