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The Weber Summit E-470 is loaded with features including four main burners as well as sear, side, smoker, and rotisserie burners. All of these burners put eight knobs on the front of this grill so this is a perfect grill for the gadget lover. Add to that a handle mounted LED grill light, backlit control panel, and a dozen other options, and you get a grill that has it all.
The E-470 sacrifices some of its 468 square inches of primary grilling space to make way for the smoker box and rotisserie burner, but still has plenty of room. The E-470 is the same price as the equally featured stainless steel S-470 version.
The Weber Summit E-670 is a huge, super featured gas grill. It has everything that the E-470 does, plus two extra burners—it also takes the primary grilling space from 468 to 624 square inches. While the extra features on this grill cut away some of the surface area, it is still a very large grill. This black version (really the doors and hood are black, the rest of the grill is gray painted steel) is priced mid-range.
The Weber Summit S-460 is the custom insert version of the Summit S-470. You get all the features of the S-470 minus the side burner (though an optional side burner unit can be purchased) since this grill has no side tables.
This grill is more expensive than the freestanding model and since it is an unusual shape for a custom enclosure, make sure you know what you are getting into before you buy.
The Weber Summit S-660 is the custom insert version of the S-670. It loses the side burner since this grill doesn't have side tables, but this grill does have all the other features including the sear, smoker, and rotisserie burners.
Despite the fact that this grill doesn't have side tables, casters, a back, etc. it does cost more. The Summit inserts are not like most grill head inserts—this one has a full cabinet below which can be an advantage or disadvantage depending on your structure.
The Weber Summit S-670 has all the features of the E-670—the rotisserie, side, sear, and smoker burners plus the stainless steel doors and hood—and sells for the same price. This six-burner grill has 624 square inches of primary grilling space and all the features and extras of Weber's Summit line of grills.