I've used both, and a boxblade is much more useful because it can accomplish a variety of tasks. A back blade is very useful to distribute loose material, but that's about it. A boxblade can tear up consolidated material with rippers as well as distribute loose stuff. Because it is a box, the material can be moved a long distance without spilling out the sides as well. In a pinch, a box blade, rippers fully extended, can be used to tear up soil for planting food plots for wildlife or even a garden . . . I know because I do it every year. Lastly, if you have a loader, the box blade is usually heavier and more compact than a rear blade, and I think it works much better as a counterbalance.