What are the differences and similarities between these two lines?

The Premier box is built out of particle board.

The Premium box is built out of plywood. 

Our Premier line is offered in Oak.

Our Premium line is available in Oak, Maple, Cherry, and Hickory. 

Our Premier line is offered in stock at all our retail locations. 

Our Premium line is a special order only. These usually take 2-3 weeks to arrive to the store.