Airflow (CFM) it's air flow at 90 CFM at the hose which is higher than other premium vacuums like the dyson ball animal - or the Miele u1
Allergen-containment seal it's also a completely sealed system with hepa filtration
Attachment variety & compatibility mine came with a crevice tool a combo upholstery tool dusting brush and anti allergen dusting brush and a flexible under appliance wand
Build quality & durability the new version has upgraded the wheels to a super sturdy rubber which seems like they'll last a lifetime
Cleaning performance on carpet the same great performance on carpet
Cleaning performance on hard floors the soft roller is amazing for the finest dust up to the largest debris on hard floors
Convertible handheld design dramatically reduces the weight and makes it super easy to clean and hard-to-reach places
Filtration quality (HEPA rating, multi-stage) it's also a completely sealed system with hepa filtration
Hair-wrap prevention / anti-tangle tech there was virtually nothing to clean up
Large-debris pick-up gobbling up big messes
LED headlights brightness / usefulness bright LED lights on the floor nozzle and one on the handle
Maneuverability & swivel steering glide technology which makes it easier to maneuver
Noise level noise reduction technology
Pet-hair pickup efficiency its pet hair pickup is second to none
Suction power (air watts) we measured its suction at an astonishing 101 inches of water lift which is higher than I personally have ever seen
Value-for-money this is an excellent buy that you won't regret
Wheel quality the new version has upgraded the wheels to a super sturdy rubber which seems like they'll last a lifetime