Bissell Big Green Professional Carpet Cleaner vs Rug Doctor Mighty Pro X3

Both are corded, tank-based carpet cleaners aimed at deep cleaning rather than quick touch-ups. The Bissell Big Green is the better pick for homes with a lot of carpet and stairs, because its 8L clean and dirty tanks cut down on refills and its hose and upholstery tool are included. The Rug Doctor Mighty Pro X3 scrubs harder with its dual cross-action brush and has a larger clean tank, but its dirty tank is smaller and the upholstery tool is sold separately. Owners of both report solid deep-cleaning results; the Big Green is heavier and bulkier, while the X3 folds down for storage.

• Choose the Bissell Big Green if you want matched 8L clean and dirty tanks, an included upholstery hose, and one machine for carpets, stairs and furniture.
• Choose the Rug Doctor Mighty Pro X3 if you want aggressive brush scrubbing, a bigger clean-water tank and a folding handle for tighter storage.