Which is better for hardwood floors?

Both ship with the Fluffy Optic laser head and clean hard floors well. The V12 Detect Slim is lighter, so it is easier to move around a whole hard-floor home. The V15 adds more suction, which matters less on sealed hard floors.

Is the V15 Detect worth the extra $170?

Only if you have a lot of carpet or a large home. The V15 gives you 240 air watts and a bin more than twice the size. For apartments and hard floors, the V12 does the same job for less.

Which is better for pet hair?

Both use the Motorbar head with anti-tangle vanes, and both are rated for pets. The V15's bigger bin helps if you vacuum pet hair daily, since the V12's 0.09 gal bin fills quickly.

Which is lighter and easier on stairs?

The V12 Detect Slim, at about 5.2 lb versus 7 lb for the V15. Both convert to a handheld with one click.

Do both have HEPA filtration?

The V15 Detect is listed with whole-machine HEPA certification. The V12 uses fully sealed filtration that captures 99.99% of particles down to 0.3 microns, but its listing does not claim HEPA certification.

Which lasts longer per charge?

Both are rated up to 60 minutes in Eco mode, and real runtime drops sharply in Boost. The V15 listing also states 120 minutes, which does not match Dyson's own 60-minute figure, so treat 60 as the realistic number for both.

Dyson V15 Detect Cordless Vacuum vs Dyson V12 Detect Slim Cordless Vacuum

The V12 Detect Slim is the better buy for most people: it costs $299.99 at Woot as of November 4, 2026, versus $469.99 at eBay for the V15 Detect, and it weighs less with a stronger rating history. The V15 Detect is the pick only if you need the bigger bin, the longer rated runtime and the higher 240 air watts for large carpeted homes. Both use the same laser dust-revealing head and auto suction, so the price gap is mostly about size and power, not cleaning intelligence.

Today the Dyson V12 Detect Slim Cordless Vacuum costs $20.00 less at its best price.

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