by Dan Dutton
This page was created to explore the similarities and differences between two e-ink tablets; the BIGME B751C, and the ONYX BOOX TAB ULTRA C PRO.
This is currently a simplified comparison consisting of a table of side-by-side specifications, and review cards of each tablet, outlining their pros and cons. If a tablet has a rating then you can also click on it for a full and detailed review of the tablet.
I do write detailed ‘versus‘ comparisons, however because I am only one person it is impractical for me to compare every single e-ink tablet against every other one! So if you think that this page would benefit from being fleshed out with additional information and my own thoughts and opinions, then feel free to drop me an email at dan@ewritable.com – I will prioritise pages that get the most requests 🙂
Additional E-Ink Tablet Resources
If you’re new to e-ink tablets, you may wish to take a look at:
- My E-ink Tablet Beginner’s Guide
- My E-ink Tablet Buying Guide
I have also created a gigantic e-ink comparison table (which is also searchable/filterable, so you can whittle down your search to the tablets that best meet your needs).
And a list of (what I believe to be) the best e-ink tablets can be found here.
Now, onto the comparison between the BIGME B751C and the ONYX BOOX TAB ULTRA C PRO.
Spec Comparison
Below is the comparison table for the ONYX BOOX TAB ULTRA C PRO and BIGME B751C
| PRODUCT | BIGME B751C | BOOX TAB ULTRA C PRO |
|---|---|---|
NEW | 👍 Recommended | |
| My Rating | Unrated | 96% |
| Price (approx) | €340 Limited availability | €700 |
| Manufacturer | Bigme | Onyx Boox |
| Release year | 2024 | 2023 |
| SCREEN | BIGME B751C | BOOX TAB ULTRA C PRO |
| Screen type | Kaleido 3 | Kaleido 3 |
| Screen size | 7" | 10.3" |
| Screen resolution (B/W) | 1264 × 1680 | 1860 x 2480 |
| Screen density (B/W) | 300dpi | 300dpi |
| Colour | ✓ (Kaleido 3) | ✓ (Kaleido 3) |
| Screen resolution (Colour) | 632 × 840 | 930 x 1240 |
| Screen density (Colour) | 150dpi | 150dpi |
| Frontlight | ✓ | ✓ |
| Wacom compatible | ⨯ | ✓ |
| Buy | ||
| HARDWARE | BIGME B751C | BOOX TAB ULTRA C PRO |
| CPU | 2.3 GHz octa-core | 2.8 Ghz octa-core |
| RAM | 4Gb | 6Gb |
| Storage | 64Gb | 128Gb |
| Battery | 2300mAh | 4600mAh |
| Super Refresh | ⨯ | ✓ |
| Keyboard folio | ⨯ | ✓ |
| Speakers | ✓ | ✓ |
| Microphone | ✓ | ✓ |
| G-Sensor | ⨯ | ✓ |
| Ceramic Tip | ⨯ | ⨯ |
| Bluetooth | ✓ | ✓ |
| Fingerprint scanner | ✓ | ✓ |
| SD card slot | ✓ | ✓ |
| Rear camera | ⨯ | ✓ |
| Front camera | ⨯ | ⨯ |
| Waterproof | ⨯ | ⨯ |
| USB-C | ✓ | ✓ |
| Width | 155mm | 184.5mm |
| Height | 136.2mm | 225mm |
| Thickness | 7mm | 6.6mm |
| Weight | 140g | 450g |
| Buy | ||
| SOFTWARE | BIGME B751C | BOOX TAB ULTRA C PRO |
| Operating system | Android 11 | Android 12 |
| Google Play Store | ✓ | ✓ |
| Kindle support | ✓ | ✓ |
| Handwriting search | ⨯ | ✓ |
| Handwriting conversion | ✓ | ✓ |
| Insert shapes | ✓ | ✓ |
| Insert images | ✓ | ✓ |
| Split screen | ✓ | ✓ |
| Custom templates | ✓ | ✓ |
| No. templates | 15+ | 40+ |
| Brush types | Pen, Pencil, Brush, Ball Pen, Highlighter | Fountain Pen, Paintbrush, Ballpoint Pen, Pencil, Marker |
| Screen share | ✓ | ✓ |
| ADE support | ⨯ | ⨯ |
| File formats | PDF, EPUB, EPUB3, DOC, DOCX, TXT, RTF, HTML, FB2, CBZ, CBR, OEB, AZW3, MOBI, PRC, TXT, ZIP | PDF, EPUB, DOC, DOCX, PPT, PPTX, TXT, HTML, RTF, FB2, CBZ, CBR, AZW3, MOBI, PRC, DJVU, CHM, ZIP |
| File formats (image) | PNG, JPG, BMP | PNG, JPG, TIFF, BMP |
| File formats (Audio) | WAV, MP3 | WAV, MP3 |
| Buy | ||
| BUY | BIGME B751C | BOOX TAB ULTRA C PRO |
| Where to buy | Amazon Bigme Store | Boox Euro Shop Boox Shop Reseller (CA) Amazon BE Amazon DE Amazon ES Amazon FR Amazon IT Amazon NL Amazon PL Amazon UK Amazon US eBay AU eBay CA eBay DE eBay ES eBay FR eBay IE eBay IT eBay UK eBay US |
| PRODUCT | BIGME B751C | BOOX TAB ULTRA C PRO |
To compare even more e-ink tablets, click here for the full comparison table.
BIGME B751C Review Card
BIGME B751C
| Full Review
~€340
Check prices
Overall rating
Pros
- Not yet reviewed...,Page turn buttons
Cons
- Not yet reviewed...
Where to buy?
Amazon, Bigme Store,
Not yet reviewed...
ONYX BOOX TAB ULTRA C PRO Review Card
ONYX BOOX TAB ULTRA C PRO
| Full Review
~€700
Check prices
Overall rating
Pros
- Colour screen
- High screen resolution/density
- Great hardware specs
- Very versatile
- Sophisticated native reading & note-taking apps
- Handwriting search/conversion
- Google Play Store
- Frontlight
- Onboard GPU & Boox Super Refresh Tech
- Audio (speakers and microphone)
- MicroSD card slot
- 16Mpx camera
- Optional Keyboard Folio
Cons
- Steeper learning curve
- GPU/Super Refresh uses more power
- Screen is darker than monochrome e-ink tablets
- Some ghosting when the screen changes
- Lots of options can lead to less focused work
- Some chassis design flaws
- Writing feels a little 'slippy'
Where to buy?
Boox Euro Shop, Boox Shop, Reseller (CA), Amazon BE, Amazon DE, Amazon ES, Amazon FR, Amazon IT, Amazon NL, Amazon PL, Amazon UK, Amazon US, eBay AU, eBay CA, eBay DE, eBay ES, eBay FR, eBay IE, eBay IT, eBay UK, eBay US,
On paper, it's the most powerful e-ink tablet on the market and is very impressive, but I feel that practical use cases will be limited.
About the author
Dan Dutton
Website | + posts
Dan Dutton is passionate about E-ink writing tablets, which bring together the pleasure of writing on paper with the power of digital technology. When he bought his first tablet, he realised that there wasn't a lot of unbiased information available for people that were considering buying an E-ink tablet, and so he built eWritable.
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