Let the hive mind of Engadget get that for you.
"I just switched to Sprint from Verizon about three months ago for the Pre. Then I went for the Hero about a week ago. Now, I miss my hardware keyboard and am thinking about switching to the Moment. I am still able to switch back to Verizon if I want and get the Droid when it arrives. Should I just trade up to the Moment when it comes out, see if I like it, and if not switch to the Droid? Or something else entirely? Help!"
Nokia manufactures 3 different variants of the N78, depending on the area where they will be sold. As Erik suggested, RM-236 is for sale in China, where regulatory requirements do not allow mobile devices to include WCDMA and WiFi bands. RM-236 is effectively the same device as the RM-235, on which the testing has been based, apart from the removal of the WCDMA and WiFi bands.
RM-342 is the N78 variant that will be for sale in the American market - it contains WCDMA850, WCDMA1900 and WiFi; this will be filed to the FCC in due course.
Hope that clarifies...Mark Durrant, Nokia