Hi RCBoater,
Welcome to the Heartland Owners Forum.
Mallard is sold exclusively by Camping World. Each Mallard model is derived from a product in the Heartland lineup, but built to Camping World's specifications. The differences are typically very minor.
Camping World, having exclusive rights to sell Mallard, can set the price the same at every Camping World. Independent dealers selling the comparable Heartland product may have more flexibility in making a deal.