Droid 2 Global - Will switching from Global to CDMA-only improve battery life?

I recently got a DROID 2 Global with Verizon and am looking to maximize my battery life. I am aware of the need to dim my display, disable Wi-Fi and GPS when not using it, increase sync intervals, and all that good stuff. However, in my continuing effort to maximize my battery life without shutting down stuff I really need, I came across the network mode settings. Since I am not planning to leave the U.S. any time soon, I don't need global so I've switched it to CDMA. I have heard that this might not make a difference because the phone only searches for the Global network if it can't find CDMA. However, the source didn't seem fully reliable **Question**: Will switching to CDMA-only use less resources (and power) than Global, or will it make no difference because Global and CDMA-only perform the same in the presence of network?