Over at Gamespot they have a short but decent interview with EALA Senior Producer Mike Glosecki about C&C 3 on the Xbox 360. There's some discussion about why the decision was made to port to 360, and some of the differences between the two versions of the game, especially in terms of control systems, though some more details would be desireable. Here's a piece:
GameSpot: So what motivated you to bring the Command & Conquer franchise to the Xbox 360?
Mike Glosecki: We paved the way for Command & Conquer (C&C) with our recent release of The Lord of the Rings, The Battle for Middle-earth II on the Xbox 360, which was widely acknowledged as the first "RTS on console done right." Our innovative new control system made the RTS experience accessible to a whole new audience. Now it's time to build on that foundation with Command & Conquer 3 Tiberium Wars (C&C3). With its fast, fluid, and fun RTS gameplay, C&C3 is a natural for the console. We're improving everything about the console RTS experience. We've made the control system considerably more accessible and powerful, improved frame rate, eliminated lags and hitches, pumped up the graphics, and upgraded the underlying technology in a number of other ways.
You can read the full interview here