Z Grills 450E vs 550B2

The stainless lid matters more than it reads

Z Grills states a 2.0mm stainless steel lid on the 450E, against unspecified construction on the 550B2. A thicker, stainless lid does two things: holds heat better, so the controller feeds fewer pellets, and resists corrosion where painted steel chips and rusts.

On the cheapest grills in the market, build quality in the lid is where longevity lives. If the grill will sit outdoors through a winter — even covered — that is a real consideration.

94 square inches is a rib rack

459 to 553 square inches is roughly one extra rack of ribs or two extra chickens. At the 100 square inches per person rule of thumb, it is the difference between comfortably feeding four and comfortably feeding five.

For most households that is the deciding factor, which is why the 550B2 is the one we point to more often.

The published accuracy figure

Z Grills states +/-20°F on the 450E and no figure on the 550B2. The controller is the same PID 3.0 family, so we would expect comparable behavior — but we are noting the difference in what is published rather than assuming they are identical.

We have not instrumented either grill. Where a maker publishes a figure we cite it; where they do not, we say so rather than inferring one from a sibling model.

Our call

The 550B2 for most people — more grate, less money, same controller family. The 450E if the stainless lid and the second probe appeal, or if you want the foldable shelves for a tight space.

If you can stretch, the 600D2 adds a storage cabinet and 19 more square inches over the 550B2, and the 7002C adds a 28 lb hopper.