I was facing the same decision, same parameter (backyard cooking, maybe a competition in the future). I just ordered a Fatboy yesterday. If you equip them the same S.S doors, upgrade firebox, 2" insulation the cost between them is minimal. That is one reason I choose the Fatboy, the other is that I want this to be the last one I buy, not looking to get a starter model and then upgrade in a year or two.
anxiously waiting for delivery