The catch
Canon MF665Cdw
Special media that it supports has to be fed one sheet at a time through the bypass.
Side by side
Canon MF665Cdw vs Brother MFC-L3780CDW: Alternate paper stock is batch-fed by Brother
Quick verdict
For repeated color batches and a multipurpose tray you can fill ahead of time, go with the MFC-L3780CDW. The MF665Cdw handles ordinary color office work and brings the same handy single-pass duplex scanning.
Before you buy
Why, and what it costs you
The second tray is where the useful extra paper capacity sits
The 29 additional sheets on Brother come from a 30-sheet multipurpose tray in place of Canon’s one-sheet feed. That matters more for alternating paper stocks than for loading more plain paper in the main cassette.
Where this comes from
Each has a 250-sheet main cassette. Secondary input is 30 against 1.
The catch
Brother MFC-L3780CDW
Compared with the main cassette, the 30-sheet multipurpose tray is small.
Canon MF665Cdw
- Why pick it
- Ordinary paperwork for you calls for color and two-sided scanning
- Special media comes up now and then
- The catch
- Special media that it supports has to be fed one sheet at a time through the bypass.
Brother MFC-L3780CDW
- Why pick it
- Color batches are a regular job
- A 30-sheet multipurpose tray appeals to you
- The catch
- Compared with the main cassette, the 30-sheet multipurpose tray is small.
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What this page compares
One pass handles two-sided forms on either machine, so the choice comes down to paper trays and rated color speeds in these office multifunction printers.
For repeated color batches and a multipurpose tray you can fill ahead of time, go with the MFC-L3780CDW. The MF665Cdw handles ordinary color office work and brings the same handy single-pass duplex scanning.
Which one fits
Pick the situations that sound like you
Thirty forms to scan on both sides
The stack is handled automatically by either.
- Canon MF665Cdw
- Good
- Brother MFC-L3780CDW
- Good
Short batches often, on a second supported stock
Brother’s multipurpose tray can take batches.
- Canon MF665Cdw
- Caution
- Brother MFC-L3780CDW
- Better fit
Color reports and copies now and then
Routine color output and flatbed work are covered by each.
- Canon MF665Cdw
- Good
- Brother MFC-L3780CDW
- Good
Long color print runs that recur
The higher rated print speed belongs to Brother.
- Canon MF665Cdw
- Good
- Brother MFC-L3780CDW
- Better fit
In practice
Differences you will notice
The second tray is where the useful extra paper capacity sits
The 29 additional sheets on Brother come from a 30-sheet multipurpose tray in place of Canon’s one-sheet feed. That matters more for alternating paper stocks than for loading more plain paper in the main cassette.
How we worked this out
Each has a 250-sheet main cassette. Secondary input is 30 against 1.
Duplex scanning alone is not worth paying extra for
A 50-sheet single-pass duplex ADF comes on each. If your main need is scanning two-sided forms, both meet it, and paper handling or purchase cost can decide.
How we worked this out
Both are confirmed by manufacturer descriptions to offer 50-sheet single-pass duplex scanning.
A color batch shows how big the speed gap is
At rated continuous simplex speeds, 130 pages come to five minutes on Canon and about 4.2 minutes on Brother. Startup, processing, duplexing and pauses are left out, so treat it as an illustration and not a measured completion time.
How we worked this out
130/26 = 5.00 minutes, and 130/31 = 4.19 minutes.
Option A
Canon, MF665Cdw
MF665Cdw
Prints color handouts and takes two-sided forms without you flipping every page.
- Best for
- Ordinary paperwork for you calls for color and two-sided scanning
Facts we checked
- Color output on Letter: Up to 26 ppm
- Multipurpose input: A single sheet
- Standard paper input: Holds 251 sheets
- Scanner: Single-pass duplex, 50-sheet
Option B
Brother, MFC-L3780CDW
MFC-L3780CDW
Color charts and two-sided paperwork for a shared network.
- Best for
- Color batches are a regular job
Facts we checked
- Color output on Letter: Up to 31 ppm
- Multipurpose input: Holds 30 sheets
- Standard paper input: Holds 280 sheets
- Scanner: Single-pass duplex, 50-sheet
Spec by spec
Where they really differ
| Spec | Canon MF665Cdw | Brother MFC-L3780CDW | In practice |
|---|---|---|---|
| Letter color output | Up to 26 ppm | Up to 31 ppm | Sustained printing gets more from the difference than occasional pages do. |
| Multipurpose input | One sheet | 30 sheets | Loading supported alternate stock over and over is cut down by Brother. |
| Standard paper input | 251 sheets | 280 sheets | The main cassettes each hold 250, which puts the extra capacity in the secondary feed. |
| Scanner | 50-sheet single-pass duplex | 50-sheet single-pass duplex | Two-sided originals are captured automatically by each. |
| Print technology | Laser | LED | Toner-based electrophotographic printing is used by each. |
Trade-offs
What each pick costs you
With Canon MF665Cdw
- Canon’s published recommended range is exceeded by recurring workloads above 2,500 pages a month.
With Brother MFC-L3780CDW
- A scan packet that goes above 50 suitable sheets has to be fed in more than one load.
Change of plan
When the answer changes
Day after day, the secondary tray gets used
Go with Brother MFC-L3780CDW. With the 30-sheet feed, single-sheet loading stops repeating.
Moderate printing, and special stock seldom comes up
Go with Canon MF665Cdw. The color and duplex-scanning brief is met by Canon.
A 50-sheet special-stock batch has to run without reloading
Neither model fits. 50 sheets do not fit in either secondary input. Supported media needs checking too.
Decision guide
How to decide
Repeated color batches call for the MFC-L3780CDW, since its multipurpose tray can be loaded in advance. Ordinary color office work is within the MF665Cdw, which scans duplex in a single pass just as usefully.
Scanning does not tell them apart
A 50-sheet stack can be captured on both sides in one pass by either one. If incoming forms are your priority, leave both on the shortlist and think about how you will use the output side.
A modest tray can reshape your day
Switching between reports and supported letterhead causes less disruption when the other stock is already loaded. Brother’s 30-sheet multipurpose tray gives you that. Canon’s one-sheet feed is better for the odd individual sheet.
Rated speed covers only part of the wait
Brother is rated at 31-ppm against Canon’s 26-ppm, but both numbers describe sustained printing under stated conditions. Startup and processing also play into a five-page job, so no simple percentage claim about total waiting time holds up.
Cost out supplies using your own documents
Toner use differs between a workload that is mostly black text and one full of color presentations. Compare the cartridges you would really use, their standardized yields and any separate maintenance parts. Cartridge yield alone does not let us name a running-cost winner.
What this page can’t tell you
- Treat rated print speeds as manufacturer numbers, since no matched hands-on tests back them.
- Toner yield figures come from standardized test documents, so content changes them.
By the numbers
What the data shows
What we found across the laser printers we compare, plus the checked facts behind each finding.
Show the facts and the math
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Canon MF665Cdw |
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| Brother MFC-L3780CDW |
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Ready to buy
See today’s price and what owners say
Open either model on Amazon for the current price, customer reviews and delivery options.
Canon MF665Cdw
Ordinary paperwork for you calls for color and two-sided scanning
See price & reviews on AmazonBrother MFC-L3780CDW
Color batches are a regular job
See price & reviews on AmazonEach link opens in a new tab.
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