according to this...
"Seems like the Ghostbusters will be a little softer and paunchier on the Wii, Nintendo DS, and Playstation 2
versus their more realistic interpretation on the Xbox 360 and Playstation 3."
Terminal Reality is taking care of the Playstation 3, Xbox 360 and PC installment of the game, whereas Red Fly Studio is handling the Wii and Playstation 2, and Zen Studios is taking on the DS version.
...and the PC version definitely doesn't look like this...