The way I look at it there are only three companies still building a hard top "canvas" side pop up camper. Forest River RV, Jayco, and Columbia Northwest. Palomino, Rockwood, Flagstaff, Viking, Coachman are all Forest River brands. Jayco and Starcraft are the same company.
Jayco and Forest River pop up campers appear to be constructed from mostly the same parts and the components are from the same suppliers. That leaves the difference in one versus the other to be the warranty, quality of construction. The remaining difference is based on the buyers choice in of size, options and design.
Am I missing something?