The real innovative feature of this monster pellet grills is that with it can be divided into two independent grills or opened up into one that can accommodate a whole hog (though a rather small one). The best part of this is that it can be a 600 square inch pellet grill when it needs to be or a 1,200 square inch grill when it has to be. For the person who might need to do a lot of cooking once in a while, this is a very good option. With two pellet controllers, mounted on opposite ends this pellet grills has all the versatility imaginable.
In fact, 80 to 85% of pellet smokers in the USA are Traegers. The consensus is that they are reasonably well built, though some buyers complain that quality has dropped since manufacturing moved to China. But of course we hear more complaints—as well as more praise—about Traegers, since eight out of 10 pellet smoker owners have one. Traeger can be found in many national chains, like Cabela's and Costco. It's not unusual to find special deals on this popular product line, so keep your eyes open.
The SG and ZG are not exactly the same though. Just from the pictures I can see that the bases are different. The SG has L-shaped legs and a bottom shelf while the ZG has square legs that are larger than the DLX legs but no bottom shelf. There were also different specs for many features. I took a picture of the ZG spec sheet at the store and compared it to the SG specs on the website and there are slight differences in capacities. For example ZG 3778 cubic inch - SG 4859, grilling area ZG 776- SG 811, hopper volume ZG 18 lbs - SG 22, ...
Although these are marketed as grills, they do much more, including baking or roasting. Because they heat by convection, you might not get the grill marks that a gas or charcoal grill will give you, but you also won’t have the flame-up problems. While many pellet grills offer high cooking temperatures, the maximum depends on ambient temperature and wind. Many users wrap their grills in special insulating covers to help maintain heat, reduce fuel use, and reach the higher temperatures they desire.