Of course 2 cats in 2 cat households are more spoiled....

At our house (2 cats, 2 boxes), Tigris stands in front of you meowing loudly which translates in "Slave, clean the box. Asap!" After it is cleaned or while you are cleaning, they are queueing up to use it as soon it's clean.

Filou has been seen to poop in one clean box and then go over to the other and pee