Although our Double hutches and 2 Tier hutches look similar, they have a couple of differences.
These have a ramp that connects the bottom level to the top. Also, a double hutch has one sleeping compartment located in the upper left side.
2 Tier hutch
The main difference between the Double and 2 Tier hutch is the 2Tier doesn't have a ramp, and both floors are separated. 2Tier hutches instead have two sleeping areas.