Epson - WorkForce Pro WF-7840 vs HP - OfficeJet Pro 9135e
Between the WorkForce Pro WF-7840 and OfficeJet Pro 9135e, the WorkForce Pro WF-7840 comes out ahead in pages/min (mono), while the OfficeJet Pro 9135e wins on pages/min (color). Overall, the WorkForce Pro WF-7840 scores 60.4 and the OfficeJet Pro 9135e scores 57.1 on our Mars Score.
Which should you buy?
The WorkForce Pro WF-7840 edges ahead on the Mars Score (60.4 vs 57.1), but the 3.3-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the WorkForce Pro WF-7840 if you care most about pages/min (mono). The biggest gaps in its favor are pages/min (mono).
Pick the OfficeJet Pro 9135e if you care most about pages/min (color). Its strongest claims are pages/min (color).
Both ship with comparable type, color, auto duplex, so those specs don't separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity tells you both are well-rounded; the differences are about trade-offs, not quality.
Why Epson - WorkForce Pro WF-7840 wins
- ▲Pages/min (mono) — 13.64% more. 25 vs 22.
Why HP - OfficeJet Pro 9135e wins
- ▲Pages/min (color) — 50.00% more. 18 vs 12.
Spec comparison
Spec
| Spec | Epson - WorkForce Pro WF-7840 | HP - OfficeJet Pro 9135e |
|---|---|---|
| Type | Inkjet AIO | Inkjet AIO |
| Color | true | true |
| Pages/min (mono) | 25lead | 22 |
| Pages/min (color) | 12 | 18lead |
| Resolution | 4800x2400 dpi | 4800x1200 dpi |
| Max paper size | Tabloidlead | Letter |
Features
| Spec | Epson - WorkForce Pro WF-7840 | HP - OfficeJet Pro 9135e |
|---|---|---|
| Auto duplex | true | true |
| ADF | true | true |
| Wi-Fi | true | true |
| AirPrint | true | true |
Spec-level deep dives
More from the same brands
vsMars is reader-supported. When you buy through links on our site, we may earn an affiliate commission at no extra cost to you. Learn more.