Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Epson - WorkForce Pro WF-7840 | Pantum - BM5100ADW |
|---|---|---|
| Pages/min (mono) | 25 | 40 |
| Color | true | false |
| Pages/min (color) | 12 | 0 |
Between the WorkForce Pro WF-7840 and BM5100ADW, the WorkForce Pro WF-7840 comes out ahead in color / pages/min (color), while the BM5100ADW wins on pages/min (mono). Overall, the WorkForce Pro WF-7840 scores 73.1 and the BM5100ADW scores 82.7 on our Mars Score.
Which should you buy?
The BM5100ADW is the clear pick on raw spec strength, leading by 9.6 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the WorkForce Pro WF-7840 if you care most about color / pages/min (color). The biggest gaps in its favor are color, pages/min (color). The single most decisive one: Has Color.
Pick the BM5100ADW if you care most about pages/min (mono). Its strongest claims are pages/min (mono). The single most decisive one: Pages/min (mono) — 60.00% more. 40 vs 25.
Both ship with comparable auto duplex, adf, airprint, so those specs do not separate the two — focus on the differences below.
Bottom line: the BM5100ADW is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: Epson - WorkForce Pro WF-7840 or Pantum - BM5100ADW?
Pantum - BM5100ADW leads the current Mars Score by 9.6 points.The more useful decision is the trade-off behind that result: compare pages/min (mono), pages/min (color), color against the way you will actually use the product.
Choose Epson - WorkForce Pro WF-7840 if…
Epson - WorkForce Pro WF-7840 has the measurable edge on color, ppm color.
Choose Pantum - BM5100ADW if…
Pantum - BM5100ADW has the measurable edge on ppm mono.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Epson - WorkForce Pro WF-7840 wins
- ▲Has Color.
- ▲Pages/min (color): 12 vs 0.
Why Pantum - BM5100ADW wins
- ▲Pages/min (mono) — 60.00% more. 40 vs 25.
Spec comparison
Spec
| Spec | Epson - WorkForce Pro WF-7840 | Pantum - BM5100ADW |
|---|---|---|
| Type | Inkjet AIO | Laser AIO |
| Color | truelead | false |
| Pages/min (mono) | 25 | 40lead |
| Pages/min (color) | 12lead | 0 |
| Resolution | 4800x2400 dpi | 1200x1200 dpi |
| Max paper size | Tabloidlead | Letter |
Features
| Spec | Epson - WorkForce Pro WF-7840 | Pantum - BM5100ADW |
|---|---|---|
| Auto duplex | true | true |
| ADF | true | true |
| Wi-Fiⓘ | true | true |
| AirPrint | true | true |