This forum is a great place BUT many will tell you that you should buy what they have and do not have any point of reference for other brands. Most manufacturers have simular building practices and use the same components. There is a difference between "entry level" any "high end" just as there is a difference between Toyota and Lexus. All modern gas units are built on the same chassis but there is a choice when you get into a diesel unit.
Motor homes are hand built in a rolling factory. Two of the same make and models can leave the factory with slight differences in fit and finishe. One could have a list of needed repairs and the other may never come back for repairs.
The true differences in manufacturers and dealers is the service after the sale.