When you deplete glycogen, there is an upregulation of fat burning. If you do that in the end of the week cycle, you won´t have these benefits.
However, having the glycogen stores full, makes the enviroment more anabolic.
The UD2 have the two goals within a week cycle by first depleting the glycogen stores and burning fat and sencondly by supercompensating those stores and making the enviroment more anabolic