The Weber Rapidfire Chimney Starter is the better pick for most people because its manufacturer-published details make the larger-batch proposition unusually clear. Weber specifies a 1.6-gallon size that holds approximately 5.7 pounds of standard charcoal briquettes, plus a large ventilated chamber below. It also names durable aluminized steel, a heat shield, a sturdy side handle, and a flip-up helper handle for two-handed pouring. Those are concrete ownership details rather than a vague claim about a better fire.
The Kingsford Heavy Duty Deluxe Charcoal Chimney Starter has a real advantage for the shopper who does not need the biggest listed chamber. Kingsford publishes a 10.74 by 6.8 by 11.25 inch format, durable rust-resistant zinc steel, a heat shield, and a stay-cool handle. Its listed dimensions are smaller than Weber’s 12.5 by 8.1 by 12.7 inches, which gives a buyer a straightforward reason to favor it when shelf space or a compact grill-side kit matters more than Weber’s stated capacity and helper handle.
Neither choice is a promise about lighting time, fire management, or safety in every setup. A chimney is a hot-use grill accessory. Read the exact product instructions, keep the work area appropriate for live coals, and choose the starter whose published capacity, footprint, and handle layout match the charcoal routine you intend to repeat.