Mahdi and Paranoid Android 4.3+ are the only two AOSP ROMs to use the full Android 4.4.x sources for everything (kernel, drivers, sensors, libs, audio, etc).
All other AOSP ROMs, including CM, use Android 4.4.x sources + 4.2.x kernel, drivers, sensors, libs, audio, etc.
Typos courtesy of my LG G2 (D803) running Mahdi-ROM.