Look at cooking power (watts), interior capacity, and the presence of features like preset programs, child lock, and digital controls. A flat‑bed design can accommodate larger or oddly shaped dishes, but turntables often provide more even heating for standard plates. Consider your typical food items and kitchen space to decide which design fits your needs.

The EM031MB11 and EM036AB14 both deliver 1000 W and have a 12.4‑inch turntable, offering the largest cooking cavity among the Black+Decker lineup. The EM720CB7 provides 700 W with a 10‑inch turntable, making it more compact but slower for high‑power tasks. The EM720CB7’s smaller footprint (17.3" × 13.0" × 10.2") is ideal for tighter countertops.

The SIMOE 0.7 cu ft Retro Microwave (B0CM3KP8N1) combines a compact size, five power levels, and eight auto‑programs at a low price point, making it a strong value for limited spaces. Its removable turntable and child lock add convenience and safety without inflating cost. For slightly larger capacity, the Nostalgia 0.9 cu ft model (B0CX5CZ44T) provides 800 W and more presets while still fitting on a modest countertop.

The COMMERCIAL CHEF units deliver 1000 W power and a larger 1.1 cu ft cavity, which is beneficial for bulk cooking or family meals. They also include more preset menus and a stainless‑steel finish that may appeal to professional‑looking kitchens. If you need the extra space and robust features, the price premium is justified; otherwise, Black+Decker models provide comparable performance for everyday use.

Presets like popcorn, pizza, and beverage simplify cooking by automatically selecting optimal power and time, saving you guesswork. Express start (30‑second touch) is handy for quick reheating and can speed up daily routines. Models such as the Black+Decker EM031MB11 and the Nostalgia Retro Microwave both include these conveniences, making them user‑friendly choices.

A child lock prevents accidental activation, which is especially important in households with young children. Most Black+Decker and COMMERCIAL CHEF models feature this safety feature, while the RV‑specific microwaves also include it. It adds a small layer of security without complicating everyday operation.

Interior dimensions determine the size of dishes you can fit, while the overall footprint impacts how much counter space the unit occupies. For example, the EM036AB14 offers a spacious 13.82" × 15.98" interior but measures 20.4" × 16.7" externally, requiring more countertop room. If space is limited, prioritize a smaller overall size even if it means a slightly reduced cooking cavity.

Stainless steel provides a sleek, modern look and is more resistant to fingerprints and smudges than matte black finishes. It can also be easier to clean and may better match contemporary kitchen appliances. However, the functional performance—power, capacity, and features—remains the same regardless of the exterior color.