Levoit LVAC-300 vs Shark BU3521: It is a powered sofa brush or an emptying dock, and neither kit has both

Check these before you buy

• The LVAC-300 selected here is US model LSV-V202PE-BUS, which comes with a Mini Motorized Brush, 2-in-1 crevice tool, wall mount and charger. The BU3521 selected includes its automatic emptying base, crevice tool and nonmotorized Pet Multi-Tool. Shark’s family manual also shows optional accessories, and those are not automatically in this package.
• Use either vacuum on suitable dry debris only, and check the upholstery maker’s cleaning directions first. A motorized brush may not suit every fabric. Switch off before you remove tools or clear them. A powered mini tool is a functional difference and not measured proof of better pet-hair pickup.
• Empty LVAC-300’s dustbin by hand before MAX, holding it over a waste bin with the vacuum switched off. Removing brush debris and washing filters are separate tasks. Let washed parts dry fully before you reassemble, and never run the vacuum unless the filters are correctly installed. Charge with the supplied charger and store it as the wall-mount recommendation says, or in a safe alternative the manual allows.
• With Shark, put the base together and power it as instructed, then seat the wand in the charging-post cradle. Docking it correctly starts a 15-second evacuation, and you should not take the vacuum off during it. Charging carries on afterward. That is not a full recharge time, and it does not promise that every blockage or piece of debris clears automatically.
• Shark’s station bin lifts out and is emptied over the trash. Dock filters still need cleaning at least once a month, using cold water only, and at least 24 hours of air drying before they go back in. Brush fine debris off the exhaust foam filter surface before taking it out. The handheld filters and the roller need their own care too. Before any blockage or charging-post maintenance that applies, switch off and unplug the dock.
• Measure the spot with the assembled setup in mind, along with the outlet position and room to remove the station bin and filters. The product-dimension field available does not establish installed working clearance, so no numerical fit guarantee is made. Charging access is needed for both models, and a station does not remove the need to handle its bin later.
• When reading runtime advertising, treat modes and tools as separate. Levoit’s endurance figures change with the attached tool, and Shark’s headline figure is measured at the hand vacuum in ECO, so the two figures do not make a matched floor-cleaning comparison. Shark’s automatic floor response works in AUTO and does not work in ECO or Boost.