All I know is I want one. I have a FBMLE, so don't know about the NMFBMLE. With a full convex grind, though, I can tell you it has to be a chopping beast. The Zilla is going to be .275 if i remember correctly, with a saber to convex grind. I think it is going to be a chopping beast.
I think it will be partly dependent on exactly what kind of chopping you are doing. A thinner blade, and less blade heavy will make for easier limbing, and will still work great for chopping. The Zilla is going to weigh more than the NMFBM, and so will likely take more energy to swing, and more fatigue when doing chores that require you to check your swing.