Main trade-off
BISSELL Little Green HydroSteam
At about 13 pounds, it is noticeably heavier than the Little Green Mini.
Head-to-head
HydroSteam is the focused choice for compatible oily or set stains. Pet Pro is easier to recommend for recurring accidents because it is lighter, has a longer hose and includes dedicated hair and crevice tools.
Before you choose
Main trade-off
At about 13 pounds, it is noticeably heavier than the Little Green Mini.
Main trade-off
It still requires manual solution mixing.


Steam-assisted stain work against higher-capacity pet cleanup.
The practical choice turns on steam and weight, then on the constraints in your own setup.
Before you choose
Both hold 64 ounces of clean water, about 4.2 pounds before formula. Their listed body weights therefore become roughly 17.2 pounds for HydroSteam and 15.2 pounds for Pet Pro before recovery liquid. If you frequently carry the cleaner to car seats or upstairs furniture, Pet Pro keeps its approximate two-pound advantage without sacrificing nominal clean capacity. Choose HydroSteam when its approved steam modes are useful enough to justify the heavier package.
These estimates add the same water load to the published 13- and 11-pound bodies. They do not predict lifting comfort or advise carrying a full machine on stairs.
HydroSteam's three modes give it an additional heat-based option, but the furniture manufacturer's care instructions must permit the chosen treatment. If the upholstery allows water extraction but forbids steam, use an approved non-steam process rather than buying for the steam feature. Pet Pro is a simpler fit when that is the whole intended job. If the material excludes water extraction, neither is established suitable.
Steam availability and surface compatibility are separate questions. This does not claim that every HydroSteam mode uses steam or transfer the upright 4123's stain chart to this different portable 3618 model.
Winner by situation
Both records list “64 ounces” for clean tank. Both records show the same result for “Clean tank”, so this row does not separate them.
Its tool set and extraction path suit recurring pet messes after the right pretreatment is applied.
For steam, BISSELL Little Green HydroSteam records “Three-mode HydroSteam” and BISSELL Little Green Pet Pro records “No”. This changes which temperature-sensitive jobs and sequences the product can handle.
Its brush and debris handling are designed to pick up hair during wet cleaning.
Its included tool or cycle flushes residue from the hose and cleaning path.
Its controllable spray and extraction can suit manufacturer-approved synthetic rugs.

BISSELL, 3618
A portable extractor with steam, wash and steam-only modes for compatible surfaces.

BISSELL, 3909
A higher-capacity portable with pet hair, crevice and self-cleaning stain tools.
Meaningful differences
| What changes | BISSELL Little Green HydroSteam | BISSELL Little Green Pet Pro | Why it matters |
|---|---|---|---|
| Steam | Three-mode HydroSteam | No | This changes which temperature-sensitive jobs and sequences the product can handle. |
| Weight | About 13 pounds | About 11 pounds | This matters when the product must be lifted, moved, transported or stored after use. |
| Clean tank | 64 ounces | 64 ounces | Both records show the same result for “Clean tank”, so this row does not separate them. |
What you give up
What the facts say
Useful conclusions from the current carpet cleaners comparison, followed by the checked facts used to reach them.
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| BISSELL Little Green HydroSteam |
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| BISSELL Little Green Pet Pro |
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Ready to choose?
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Steam is approved for the fabric
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Pet accidents dominate
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