Hi logsend,
Appliances change from time to time. A unit produced today and a unit produced in 3 months may have different makes/models. If you buy off a dealer lot, the trailer might have been built 3 months ago.
If you're thinking about placing an order in the near term, I'd suggest you call Heartland Customer Service at 877-262-8032 / 574-262-8030. Identify yourself as a prospective buyer and ask for the Brand Managers for the models you're considering.