Main trade-off
Casio PX-S1100
The music rest and cables need space beyond the bare body.
Head-to-head
Casio PX-S1100 vs Casio PX-S3100: 3100 adds accompaniment, 1100 stretches the stated battery session
The short answer
Choose the PX-S3100 if accompaniment rhythms and arranging are part of your playing. Choose the PX-S1100 for simpler piano practice and the longer stated battery runtime.
Before you choose
The reasoning and the trade-offs
The upgrade does not cost extra body depth
Both list 1322 by 232 by 102 mm before the music rest. A buyer using a shallow desk does not have to give up that body size to get the PX-S3100's 200 rhythms. Stand dimensions and cable clearance still matter, but the physical keyboard rectangle is unchanged.
What this is based on
PX-S1100: Listed width 1322 mm. PX-S3100: Listed width 1322 mm. PX-S1100: Depth before music rest 232 mm. PX-S3100: Depth before music rest 232 mm. PX-S1100: Accompaniment styles Not established in the checked record. PX-S3100: Accompaniment styles 200. Conditional workflow inference from these documented inputs. No matched performance measurement.
Main trade-off
Casio PX-S3100
The manufacturer's alkaline-battery estimate is about two hours under its conditions.
Casio PX-S1100
- Choose it for
- Your practice spot has no convenient outlet
- Main trade-off
- The music rest and cables need space beyond the bare body.
Casio PX-S3100
- Choose it for
- You want accompaniment without a deeper piano body
- You build arrangements with rhythm accompaniment
- Main trade-off
- The manufacturer's alkaline-battery estimate is about two hours under its conditions.
About this comparison
Casio PX-S1100 vs Casio PX-S3100: compare keyboard mechanism, depth before music rest, preset voices and the practice routines that change the better choice.
These two Casio pianos share the same bare dimensions and Smart Scaled Hammer action. The extra cost is mainly about accompaniment and control, with a shorter manufacturer battery estimate on the PX-S3100.
Winner by situation
Start with what you need it to do
You want accompaniment without a deeper piano body
Both list 1322 by 232 by 102 mm before the music rest. A buyer using a shallow desk does not have to give up that body size to get the PX-S3100's 200 rhythms. Stand dimensions and cable clearance still matter, but the physical keyboard rectangle is unchanged.
- Casio PX-S1100
- Good
- Casio PX-S3100
- Better fit
Your practice spot has no convenient outlet
Casio rates the PX-S1100 around four hours and the PX-S3100 around two hours on alkaline batteries. These are manufacturer estimates, not matched runtime tests. Still, a session planned away from an outlet needs a more cautious spare-battery plan for the PX-S3100.
- Casio PX-S1100
- Better fit
- Casio PX-S3100
- Good
You build arrangements with rhythm accompaniment
The PX-S3100 adds 700 tones, 200 rhythms and a three-track recorder. The PX-S1100 has 18 tones and two tracks. For plain hand-by-hand piano practice, the extra arranging tools may stay unused. For building a backing part around chords, they are a practical reason to choose the 3100.
- Casio PX-S1100
- Good
- Casio PX-S3100
- Better fit
You want two headphone connections and phone music
Both provide those features with the included wireless adapter. They do not by themselves justify the PX-S3100.
- Casio PX-S1100
- Good
- Casio PX-S3100
- Good
What matters in practice
The differences that matter
The upgrade does not cost extra body depth
Both list 1322 by 232 by 102 mm before the music rest. A buyer using a shallow desk does not have to give up that body size to get the PX-S3100's 200 rhythms. Stand dimensions and cable clearance still matter, but the physical keyboard rectangle is unchanged.
How we reached this conclusion
PX-S1100: Listed width 1322 mm. PX-S3100: Listed width 1322 mm. PX-S1100: Depth before music rest 232 mm. PX-S3100: Depth before music rest 232 mm. PX-S1100: Accompaniment styles Not established in the checked record. PX-S3100: Accompaniment styles 200. Conditional workflow inference from these documented inputs. No matched performance measurement.
An afternoon away from power favors the simpler model
Casio rates the PX-S1100 around four hours and the PX-S3100 around two hours on alkaline batteries. These are manufacturer estimates, not matched runtime tests. Still, a session planned away from an outlet needs a more cautious spare-battery plan for the PX-S3100.
How we reached this conclusion
PX-S1100: Manufacturer battery estimate About 4 hours under manufacturer conditions. PX-S3100: Manufacturer battery estimate About 2 hours under manufacturer conditions. PX-S1100: Battery operation Yes. PX-S3100: Battery operation Yes. Conditional workflow inference from these documented inputs. No matched performance measurement.
More sounds only help when you use the arranging workflow
The PX-S3100 adds 700 tones, 200 rhythms and a three-track recorder. The PX-S1100 has 18 tones and two tracks. For plain hand-by-hand piano practice, the extra arranging tools may stay unused. For building a backing part around chords, they are a practical reason to choose the 3100.
How we reached this conclusion
PX-S1100: Preset voices 18. PX-S3100: Preset voices 700. PX-S1100: Accompaniment styles Not established in the checked record. PX-S3100: Accompaniment styles 200. PX-S1100: Internal recorder tracks 2. PX-S3100: Internal recorder tracks 3. Conditional workflow inference from these documented inputs. No matched performance measurement.
Choice A
Casio, PX-S1100
PX-S1100
A 232 mm body depth, battery operation and two headphone sockets fit a flexible practice corner. The selected Amazon offer is white and includes the wireless adapter.
- Best matched use
- Your practice spot has no convenient outlet
Checked facts
- Keyboard mechanism: Smart Scaled Hammer
- Depth before music rest: 232 mm
- Preset voices: 18
- Accompaniment styles: Not established in the checked record
Choice B
Casio, PX-S3100
PX-S3100
The PX-S3100 puts 200 accompaniment rhythms and a three-track recorder inside the same 232 mm depth as the simpler PX-S1100. Dedicated outputs support a separate speaker setup.
- Best matched use
- You want accompaniment without a deeper piano body
Checked facts
- Keyboard mechanism: Smart Scaled Hammer
- Depth before music rest: 232 mm
- Preset voices: 700
- Accompaniment styles: 200
Meaningful differences
What changes the fit
| What changes | Casio PX-S1100 | Casio PX-S3100 | Why it matters |
|---|---|---|---|
| Keyboard mechanism | Smart Scaled Hammer | Smart Scaled Hammer | Try the documented mechanism before treating its name as a guarantee about feel or mechanical noise. |
| Depth before music rest | 232 mm | 232 mm | Bare depth excludes the music rest, cable route and comfortable playing clearance. |
| Preset voices | 18 | 700 | Extra tones are useful when the playing routine needs them. They do not measure piano realism. |
| Accompaniment styles | Not established in the checked record | 200 | Accompaniment patterns matter for arranging and play-along sessions, not every piano lesson. |
| Internal recorder tracks | 2 | 3 | Track allocation and independent overdubbing matter more than a large number alone. |
| Manufacturer battery estimate | About 4 hours under manufacturer conditions | About 2 hours under manufacturer conditions | Manufacturer estimates use their own conditions and do not establish matched runtime. |
What you give up
Every choice has a cost
If you choose Casio PX-S1100
- USB audio-file recording and Bluetooth share the USB-A socket, so check the connection plan.
If you choose Casio PX-S3100
- A half-pedal setup requires the optional SP-34, rather than the included switch.
Recommendation switch
The decision flips if...
Your practice spot has no convenient outlet
Choose Casio PX-S1100. Casio rates the PX-S1100 around four hours and the PX-S3100 around two hours on alkaline batteries. These are manufacturer estimates, not matched runtime tests. Still, a session planned away from an outlet needs a more cautious spare-battery plan for the PX-S3100.
You want accompaniment without a deeper piano body
Choose Casio PX-S3100. Both list 1322 by 232 by 102 mm before the music rest. A buyer using a shallow desk does not have to give up that body size to get the PX-S3100's 200 rhythms. Stand dimensions and cable clearance still matter, but the physical keyboard rectangle is unchanged.
You require a verified winner for mechanical key noise or personal playing comfort
Choose neither. The manufacturer records do not provide a matched test for those outcomes. Try the instruments in your intended conditions.
What matters in practice
Before you choose
What this comparison cannot tell you
- The comparison uses documented specifications and conditional setup reasoning. We have not measured key feel, mechanical noise or speaker performance side by side.
- Dimensions describe the specified body or cabinet. Leave room for the rest, cables, bench and player.
- Check the exact Amazon model, color, supplied accessories, condition and delivery date before ordering.
What the facts say
What the comparison shows
Useful conclusions from the current digital pianos comparison, followed by the checked facts used to reach them.
See the checked facts and calculation notes
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Casio PX-S1100 |
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| Casio PX-S3100 |
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Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
Casio PX-S1100
Your practice spot has no convenient outlet
See price & reviews on AmazonCasio PX-S3100
You want accompaniment without a deeper piano body
See price & reviews on AmazonLinks open in a new tab.