There is a lever on the back for this compression mechanism that you press by hand and a separate button to open the bin underneath. You can use the compression lever when it is closed and open. It helps compress hair and dust as I vacuum, helping me see if I’ve really filled the bin, even if at some point it stops compressing. It helps to push away debris when needed too, compared to the times when I have to put my hand on the Dyson and Shark to get rid of loose hair and dust. Dyson has the same features as Piston Animal V16, which will be released this yearso I’m interested to see which mechanism is better engineered.

Definite winner: Shark

Photo: Nena Farrell

If you’re looking for a vacuum that can bend to reach under furniture, I prefer the Shark over the Bosch. Both have a similar mechanism and feel, but the Bosch tends to push debris when I use it in an active bend, while the Shark is able to vacuum debris that I can’t get to the Bosch without lifting it and placing it on top of particular debris (in this case, rogue cat kibble).

Accessory Winner: Dyson

Dyson is first because the Dyson Gen5 Detect has three attachments and two heads. You get a Motorbar head, a Fluffy Optic head, a hair tool, a combination tool, and a dust and crevice tool that is actually built into the tube rod. I like that it’s built in vacuum so it’s a less separate attachment to carry around, and it makes me more likely to use it.

But Bosch is also good in this area. You can get an upholstery nozzle, a furniture brush, and a crevice nozzle. This is one more attachment than you get on the Shark, and Bosch also includes a wall mount that you can wire the charging cord through for storage and charging, and you can mount two attachments on it. But I will say, I like that the Shark includes a simple tote bag to store the attachments.

Build Winner: Tie

Photo: Nena Farrell

All three of these vacuums have good build quality, but each feels like it’s focused on something different. The Bosch feels the lightest of the three and stands the easiest on its own, but all three need something to lean on to stay upright. Dyson is the worst at this; it also needs a seat or table inserted under the canister, or it will roll forward and tip over. The Bosch has a sleek black look and a colorful LED screen that will show you a picture of carpet or hardwood depending on which mode it’s vacuumed.