Performance

This is the most important category, and Coway wins. The Coway Mighty has a CADR of 421m3/h, which is a strong indicator of faster air cleaning in real-world use. That matters in UK homes where you may be dealing with pollen in spring and summer, traffic pollution, pet dander, or lingering smoke from cooking and candles. The Levoit Vital 100S is rated for up to 1120 sq ft, but that headline figure is usually based on very optimistic conditions; in practical terms, it is better thought of as a purifier for smaller rooms or for maintaining air quality rather than rapidly clearing a polluted space. Coway’s higher airflow means it is the better choice if you want quicker turnaround in a bedroom, open-plan living room, or a larger family space.

Winner: Coway.

Filtration and allergen removal

Both machines use HEPA-style filtration and are designed to capture dust, pollen, pet hair, and smoke particles. Levoit claims 99.97% removal of allergens, which is the standard HEPA benchmark and absolutely respectable for everyday allergy control. Coway claims 99.999% removal of harmful particles down to 0.01µm, which is a more aggressive claim on paper, and its strong independent reputation backs up its filtration performance. For people with hay fever during the UK pollen season, or households struggling with mould spores and pet allergens, Coway has the edge because it combines stronger filtration claims with higher airflow. The caveat is that real-world performance depends on room size, fan speed, and how often you run it. If you keep Levoit in a properly sized room and run it consistently, it will still do a very good job.

Winner: Coway.

Sensors, automation, and smart features

Levoit wins here. The Vital 100S includes an air quality sensor, light sensor, pet mode, and smart controls, making it more convenient for day-to-day use. In a bedroom, the light sensor is especially useful because it can dim or adjust the display for nighttime use, which is ideal if you’re sensitive to light while sleeping. Pet mode is also a nice touch for homes with cats or dogs, where fur and dander build up quickly. Coway is more old-school: effective, but less feature-rich. It prioritises straightforward operation over app-driven convenience. If you want a purifier that adapts itself and feels modern in a connected home, Levoit is the better user experience.

Winner: Levoit.

Build quality and design

Coway wins on design confidence and long-term reputation. The Mighty has been a favourite for years because it feels robust, is easy to live with, and has a no-nonsense layout that suits people who want reliability over gimmicks. Levoit is also well-regarded and has a large review base, but it is more clearly positioned as a value-plus-smart-features product rather than a premium tank-like appliance. In practical terms, both are acceptable for a bedroom or lounge, but Coway’s build and track record make it the safer bet if you want a purifier that feels like a long-term investment. If your priority is a tidy, modern-looking unit with app-based convenience, Levoit still does very well.

Winner: Coway.

Noise and bedroom suitability

Levoit has the edge for bedroom use. The combination of smart sensing, light sensor, and pet mode makes it easier to leave running overnight without fiddling with settings. For light sleepers, that matters more than raw power. Coway can be quiet enough at lower speeds, but because it is built to move more air, it is naturally more likely to be noticeable when pushed harder. If your main use case is a bedroom, especially one affected by dust or pollen, Levoit is the more comfortable all-round companion. If you need rapid cleaning before sleep and don’t mind a bit more fan presence on higher settings, Coway still performs better overall.

Winner: Levoit.

Price and value for money

Levoit wins on value. At £169.99, it is £50 cheaper than the Coway at £219.99, and that gap is meaningful in the UK market where running costs, filter replacements, and energy bills all matter. The washable pre-filter is also a practical plus because it helps catch larger particles like hair and dust before they hit the main filter, potentially extending filter life. Coway is more expensive, but you are paying for stronger airflow and a proven performance pedigree. If your room is small to medium and you want a smart purifier without overspending, Levoit is the better value. If you need the extra muscle, Coway justifies its price.

Winner: Levoit.

Features and everyday usability

Levoit offers more features that directly improve daily life: smart controls, air quality sensing, light sensing, pet mode, and a washable pre-filter. That makes it easier to live with in a bedroom, home office, or pet-friendly flat. Coway is simpler, but simplicity can be a strength if you just want to press a button and let it get on with the job. Still, when comparing feature sets, Levoit is clearly more versatile. Coway’s main feature is performance, not extras.

Winner: Levoit.

Overall user experience

This is where the decision becomes clear. If you want the best balance of price, smart features, and bedroom-friendly operation, Levoit is the easier purifier to recommend. If your priority is the strongest cleaning performance, especially for larger rooms or more demanding air quality problems, Coway is the better machine. For many UK buyers dealing with spring pollen, autumn damp, pet dander, and general household dust, Coway’s extra airflow will have a more noticeable effect on the air you breathe. However, for most people shopping in this range, Levoit offers a more complete package for less money.

Overall summary: Coway is the performance winner, but Levoit is the better all-round value and the more practical buy for most bedrooms and medium-sized UK homes.