The latest update for cm is 12.1. The last cm12 version is 4/16 that I posted above. So if you flashed the latest update from the update notification your on cm12.1 (lollipop 5.1). I didn't go to cm12.1 due to the comments in the cm12.1 thread.
Omnirom 5.1.1 has less feature than cm12 (5.0.2). But that is normal for the newest versions of android. It takes a bit to get the features integrated. But it is smooth and I'm looking for the newest version and kind of like the simplicity of it.
Keep in mind if you run into issues flashing from 4.4 up to 5.1, a factory reset might be needed.
I flash new updates from the phone itself as it provide updates for cyanogenmod version and currently running 12.1 20150708 nightly...android version is 5.1.1...maybe I need to factory reset tomorrow..just give it a try for today to see the battery performance..just the auto brightness is a bit problem...but its okay as long as it can running good..i'll update tomorrow and we'll see how's it going to work..thanks romman0 for keeping up with me..