I've got both the Dual Fuel and propane single burner stove and dual mantle lantern from Coleman, but I've never fired up the NIB Dual Fuel stuff. The propane works fine and while I'd like to have a two burner camping stove, the single burner worked well for me during hurricane IRMA and 84 hours 'in the dark'.
As it was passing, I used it to boil the tea kettle for a pitcher of iced tea! It worked fine and would support some larger pots and pans.
You never know and even a smaller single burner and 1# propane bottle takes up very little space. Unless you're cooking for a family of 4, you don't need the added space, IMO and if you have to buy a second one and carry a second bottle, it's still less volume.
Chris