With the RG RM11, only the top and bottom plates are RG while the middle section of the case is Ti. If you like 2 tone watches, then you should definitely get the RG version.
The weight of the RM11 Ti is fairly light compared to how large it looks; but in reality, on the wrist, it still feels like wearing a smaller stainless steel watch. Extremely comfortable watch, and I highly encourage getting one if you have your eyes on one!
Cheers,
Anthony