Shark PRO Steam & Spray and Steam & Spray PRO, do the names confuse you? Are they the same thing?
Both of them have a detachable cable; feature swivel steering; can Spray Only, Steam Only, or Spray and Steam at the same time; can go cordless to Spray Only. However, they are not identical.
The PRO Steam & Spray SK460 has only 1 head,
it uses Intelligent Electronic Steam Control that offers 3 steam level options. You can press the control button to select one that suits your cleaning needs best.
its water tank holds 450ml is located at the back of the main body, you fill it with the filling flask.
The Steam & Spray PRO SS460WM and SS460D (same unit except for the color and included accessories) come with 2 interchangeable heads, one Steam & Spray Head and one Spray-Only Mop Head.
they use Automatic Electronic Steam Control which claimed to provide the perfect amount of steam leaving floors sanitized with little residue, they do not have steam modes to select manually.
the water tank holds 355ml is located at the Steam & Spray Head, this allows you to detach the steam head to fill the tank at the sink or fill it with the filling flask.
The SK460 has a longer power cord than the SS460.
Read manuals to learn more.
Shark SK460 Manual – http://www.sharkclean.com/include/pdf/manual-SK460.pdf
Shark SS460 Manual – http://www.sharkclean.com/include/pdf/manual-SS460.pdf