Actually, Rainbow Six 3 for X-Box is practically a completely different game from RS3: Raven Shield for PC. In the X-Box version, you only get Chavez, Weber, Louiselle, and Prince. All of the character models are vastly improved, the AI is much better, and there is no planning phase. There's voice control, and you can order your team to do a ton of different things. Also, in case you haven't noticed, it doesn't have the Raven Shield designation, so other than weapon models, I'm not sure what's the same, other than the story.