It's not that simple. Crescent is the umbrella term. Both types of device are the Crescent. The device configuration has the ability to compile for both of them.
Take a look at the first post in the CM9 or CM10 thread, it explains how the device models work. By default, it will build for P736V. To build for P736E you must run "export P736E=1" before building - it'll need a clean build otherwise the build.prop won't update. (ccache will help there)
Running a P736V ROM on a P736E will result in CM's hardware keys deeming you to have the wrong button set, the screen to be misaligned due to touchscreen driver differences, and the small cosmetic of the baseband version to be wrong, and vice versa.
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