Hey Justin - I had the same question about a month ago. Similar boots - price point - weight. I ended up ordering both of them to try out. I didn't take them out of the house and didn't put them through any strenuous tests, but for me the trango cubes clearly fit better. I thought the construction and finish of both were very good. I probably would have kept the Charmoz had I not had the trango cubes to compare them to. After I decided on the trango cubes I actually ordered another size large - I was questioning if I had enough room to not bang toes. After getting the bigger size I settled on the smaller size that I originally ordered.
I would consider my feet fairly average and I don't have a lot of trouble with my heel slipping. If anywhere I can get some hot spots on my pinky toe or underneath my toes. The trango felt better in the front half of my feet. More like they were broken in. Last year I had pretty good luck with the Trango TRK. They were very comfortable but left me wanting a bit more boot on a few rough days. Several years ago I had gone with hunting in shoes, but have made my way back to a heavier boot.