The way I see it, BeanAnimal is a kind of Durso enhancement because the pipe with air-tube is a full fledged Durso design. BTW, my Durso piping has been running silently & reliably. The full length overflow may have better efficiency in nutrient export, but I foresee much of the daily fish food will also go that way before the fishies can get to them. Filter sock has to be changed more often then. One needs to strike a balance.
One more thing, BeanAnimal is not for those who wants underflow in addition to overflow.
Herbie can do both under & overflow. It is suitable for narrow overflow box that's not able to fit in a larger Durso pipe. But then, because 2 smaller pipes are used in place of a standard Durso, higher chance of blockage if LS manage to get pass overflow comb.