Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Epson - EcoTank ET-5850 | HP - OfficeJet Pro 9135e |
|---|---|---|
| Pages/min (color) | 12 | 18 |
| Pages/min (mono) | 25 | 22 |
Between the EcoTank ET-5850 and OfficeJet Pro 9135e, the EcoTank ET-5850 comes out ahead in pages/min (mono), while the OfficeJet Pro 9135e wins on pages/min (color). Overall, the EcoTank ET-5850 scores 73.1 and the OfficeJet Pro 9135e scores 71.2 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (73.1 vs 71.2). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the EcoTank ET-5850 if you care most about pages/min (mono). The biggest gaps in its favor are pages/min (mono). The single most decisive one: Pages/min (mono) — 13.64% more. 25 vs 22.
Pick the OfficeJet Pro 9135e if you care most about pages/min (color). Its strongest claims are pages/min (color). The single most decisive one: Pages/min (color) — 50.00% more. 18 vs 12.
Both ship with comparable type, color, auto duplex, so those specs do not 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 says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: Epson - EcoTank ET-5850 or HP - OfficeJet Pro 9135e?
Epson - EcoTank ET-5850 leads the current Mars Score by 1.9 points.The more useful decision is the trade-off behind that result: compare pages/min (mono), pages/min (color) against the way you will actually use the product.
Choose Epson - EcoTank ET-5850 if…
Epson - EcoTank ET-5850 has the measurable edge on ppm mono.
Choose HP - OfficeJet Pro 9135e if…
HP - OfficeJet Pro 9135e has the measurable edge on ppm color.
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 - EcoTank ET-5850 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 - EcoTank ET-5850 | HP - OfficeJet Pro 9135e |
|---|---|---|
| Type | Inkjet AIO | Inkjet AIO |
| Color | true | true |
| Pages/min (mono) | 25lead | 22 |
| Pages/min (color) | 12 | 18lead |
| Resolution | 4800x1200 dpi | 4800x1200 dpi |
| Max paper size | Letter | Letter |
Features
| Spec | Epson - EcoTank ET-5850 | HP - OfficeJet Pro 9135e |
|---|---|---|
| Auto duplex | true | true |
| ADF | true | true |
| Wi-Fiⓘ | true | true |
| AirPrint | true | true |