Blackstone Griddle vs Gas Grill: 768 Square Inches Against 360

Most flat-top-versus-grill comparisons are written about cooking styles. The decisive number is much duller than that, and both manufacturers publish it.

768 against 360

Blackstone publishes 768 square inches of cooking space for the 36-inch Omnivore. Weber publishes 450 square inches for the Spirit E-325 — and says on the same page that 360 of it is primary cooking area and 90 is a warming rack.

Compared like with like — the surface you actually cook on — the griddle gives you 408 more square inches, or a little over twice as much.

That is the whole argument, and it is not close. Everything else on this page is about whether you want that surface to be solid.

Solid plate against open grate

A grate holds food on bars with gaps between them. A griddle plate is continuous. That single difference decides most of what follows.

On the plate, fat that renders out stays where it is, and the food cooks in it. That is why smash burgers, eggs, onions, fried rice and anything small enough to fall through a grate belong on a griddle — and why a griddle produces an unbroken crust rather than bar marks.

On the grate, that same fat drips past the bars onto what is beneath — on the Spirit, the Flavorizer bars — and vaporises. That is the mechanism behind the flavour people mean when they say something tastes grilled, and a griddle cannot reproduce it because nothing drips anywhere.

You will see this quantified — "a grate touches only 20 to 30 percent of the meat" — and we are not going to repeat it, because neither Weber nor Blackstone publishes any such figure and it is not clear how anyone measured it. The difference in kind is real and obvious. The percentage is somebody's guess.

Zones, and the number Blackstone does not publish

Blackstone publishes four independently controlled heat zones across the 36-inch plate. Weber publishes three stainless steel burners and 31,000 BTU-per-hour input, plus two Boost Burners that it says give 40% more power in the Sear Zone.

Four zones across a long flat plate is a genuinely different capability from three burners under grates: it is what lets you hold eggs at one end while searing at the other, on one surface, without moving anything to a warming rack.

But Blackstone publishes no burner output. Weber's 31,000 BTU-per-hour is a fuel-consumption rate rather than a temperature, and it does not tell you how hot either surface gets — neither company publishes a maximum. What it does tell you is that one of them is willing to put a number to it.

What each company will tell you before you buy

This turned out to be the sharpest split between them, and it is not about cooking at all.

Weber publishes the Spirit's dimensions — 46.20 inches high, 48.30 wide, 26.60 deep with the lid closed — and its warranty, broken down by part: ten years on the cookbox, lid assembly and burner tubes, five on the grates and Flavorizer bars.

Blackstone's product page for the 36-inch Omnivore publishes neither. No dimensions, no weight, no warranty term. It publishes the cooking area, the four zones, the included hood, the folding side shelves and the accessory rails.

That is not evidence the Blackstone is worse made. It is a straightforward difference in how much you can find out in advance, and for a cooker that needs a permanent spot outdoors, missing dimensions are a practical problem rather than a philosophical one.

Which one to buy

Buy the Blackstone 36 Omnivore if the surface is the point. It publishes more than twice the cooking area, nothing falls through it, and four independent zones across one plate is a way of cooking a gas grill cannot copy. You are accepting a product page that will not tell you how big it is or what is guaranteed.

Buy the Weber Spirit E-325 if you want fat to drip and a lid to close. It is the one of the two that roasts, the one with a published burner output and a published warranty, and the one whose surface needs no seasoning.

The honest summary is that these are not really competitors. One is a large frying surface and the other is an oven with bars in it, and the 408 square inches only matter if the solid plate is what you wanted.