the mixing tubs are proper height to allow airflow and easy hopper setup
The tote setup personally i find inferior as a keeper. Much harder to clean and to deal with thus the animal is more prone to fall pray to neglect. Now keep in mind this statement MUST be held on similar grounds....say 3000 animals worth of caging versus the other. If you have a handful of animals then you probably won't understand the concept and wasted time and needed efforts.