Cleaning route
One mixed-floor head or two specialized heads?
The floor head is the part that meets your home, yet it is easy to compare vacuums by the motor unit alone. Start with where the nozzle must travel. A hard-floor room beside a fully carpeted room creates a different routine from a lounge with several small rugs among chairs.
When two heads make sense
A dedicated illuminated soft roller gives a clear view of hard-floor dust. A separate carpet head provides a different cleaning mechanism. If your home has a natural break between those jobs, changing heads may be a small interruption. Keep the spare head where the change happens. Buying two useful heads and storing one somewhere inconvenient loses much of the practical benefit.
When keeping one head attached matters
A mixed-floor head can make repeated transitions simpler. The Shark DuoClean Detect and Speed packages reviewed here offer that route, with differences in width, sensing and lighting. A single-head requirement becomes particularly meaningful when a rug lies between the kitchen and the next hard-floor room. Check whether the exact head is approved for your surfaces and whether powered agitation suits delicate rugs.
Light and surface support must coexist
Dedicated dust illumination should be checked on the head you intend to use. The presence of Fluffy Optic somewhere in a box does not establish illuminated carpet cleaning with Motorbar. Likewise, ordinary LED headlights should not be assumed to provide a newer model's blue Reveal feature. In the finder, choosing mixed floors and dust lighting asks for those capabilities in one attached head.
Measure the physical route too. A bending wand helps approach furniture, but cannot shrink a wide nozzle or bypass a low structural rail. For the published-size differences, compare the standalone Speed with IP1251. For a two-head routine, begin with the V12 assessment.