It is about a cm longer and 1-2 mm larger in diameter. That's it. But it is much brighter and has a longer run time.

I have been carrying the LOD for a while also. I actually decided on getting something brighter about a year ago when I was walking down a pitch black trail one night and using the LOD. While it is enough to easily see the trail and get you to your destination safely, it just wasn't going to do for looking at anything and at any appreciable distance. But the LOD for EDC and as a backup is great. So far, the EZ AA is better to me.