Main trade-off
Canon MF665Cdw
Its single-sheet bypass needs individual loading for supported special media.
Head-to-head
Canon MF665Cdw vs Brother MFC-L3780CDW: Brother batch-feeds alternate paper stock
The short answer
Choose the MFC-L3780CDW for repeated color batches and a multipurpose tray you can load in advance. The MF665Cdw suits ordinary color office work with the same useful single-pass duplex scanning capability.
Before you choose
The reasoning and the trade-offs
The extra paper capacity is in the useful second tray
Brother’s additional 29 sheets come from a 30-sheet multipurpose tray replacing Canon’s one-sheet feed. This is more relevant to alternating paper stocks than to loading more plain paper in the main cassette.
What this is based on
Both 250-sheet main cassette. Secondary input 30 versus 1.
Main trade-off
Brother MFC-L3780CDW
The 30-sheet multipurpose tray is smaller than the main cassette.
Canon MF665Cdw
- Choose it for
- You need color and two-sided scanning for ordinary paperwork
- Special-media sheets are occasional
- Main trade-off
- Its single-sheet bypass needs individual loading for supported special media.
Brother MFC-L3780CDW
- Choose it for
- You print color batches regularly
- You want a 30-sheet multipurpose tray
- Main trade-off
- The 30-sheet multipurpose tray is smaller than the main cassette.
About this comparison
Both scan two-sided forms in one pass. Compare the paper trays and rated color speeds that separate these two office multifunction printers.
Choose the MFC-L3780CDW for repeated color batches and a multipurpose tray you can load in advance. The MF665Cdw suits ordinary color office work with the same useful single-pass duplex scanning capability.
Winner by situation
Start with what you need it to do
Scanning both sides of thirty forms
Both handle the stack automatically.
- Canon MF665Cdw
- Good
- Brother MFC-L3780CDW
- Good
Frequent short batches on a second supported stock
Brother has a batch-capable multipurpose tray.
- Canon MF665Cdw
- Caution
- Brother MFC-L3780CDW
- Better fit
Occasional color reports and copies
Both cover routine color output and flatbed work.
- Canon MF665Cdw
- Good
- Brother MFC-L3780CDW
- Good
Long recurring color print runs
Brother has the higher rated print speed.
- Canon MF665Cdw
- Good
- Brother MFC-L3780CDW
- Better fit
What matters in practice
The differences that matter
The extra paper capacity is in the useful second tray
Brother’s additional 29 sheets come from a 30-sheet multipurpose tray replacing Canon’s one-sheet feed. This is more relevant to alternating paper stocks than to loading more plain paper in the main cassette.
How we reached this conclusion
Both 250-sheet main cassette. Secondary input 30 versus 1.
Do not pay extra just for duplex scanning
Both have a 50-sheet single-pass duplex ADF. If scanning two-sided forms is your main need, both pass that requirement and paper handling or purchase cost can decide.
How we reached this conclusion
Manufacturer descriptions confirm 50-sheet single-pass duplex scanning on both.
A color batch illustrates the speed gap
At rated continuous simplex speeds, 130 pages imply five minutes on Canon and about 4.2 minutes on Brother. This excludes startup, processing, duplexing and pauses, so it is an illustration rather than a measured completion time.
How we reached this conclusion
130/26 = 5.00 minutes. 130/31 = 4.19 minutes.
Choice A
Canon, MF665Cdw
MF665Cdw
Color handouts and two-sided forms without turning each scanned page.
- Best matched use
- You need color and two-sided scanning for ordinary paperwork
Checked facts
- Letter color output: Up to 26 ppm
- Multipurpose input: One sheet
- Standard paper input: 251 sheets
- Scanner: 50-sheet single-pass duplex
Choice B
Brother, MFC-L3780CDW
MFC-L3780CDW
Double-sided paperwork and color charts on a shared network.
- Best matched use
- You print color batches regularly
Checked facts
- Letter color output: Up to 31 ppm
- Multipurpose input: 30 sheets
- Standard paper input: 280 sheets
- Scanner: 50-sheet single-pass duplex
Meaningful differences
What changes the fit
| What changes | Canon MF665Cdw | Brother MFC-L3780CDW | Why it matters |
|---|---|---|---|
| Letter color output | Up to 26 ppm | Up to 31 ppm | The difference matters more for sustained printing than occasional pages. |
| Multipurpose input | One sheet | 30 sheets | Brother reduces repeated loading of supported alternate stock. |
| Standard paper input | 251 sheets | 280 sheets | Main cassettes both hold 250, so the extra capacity is in the secondary feed. |
| Scanner | 50-sheet single-pass duplex | 50-sheet single-pass duplex | Both capture two-sided originals automatically. |
| Print technology | Laser | LED | Both use toner-based electrophotographic printing. |
What you give up
Every choice has a cost
If you choose Canon MF665Cdw
- Recurring workloads above 2,500 pages a month exceed Canon’s published recommended range.
If you choose Brother MFC-L3780CDW
- A scan packet above 50 suitable sheets needs more than one feeder load.
Recommendation switch
The decision flips if...
The secondary tray will be used every day
Choose Brother MFC-L3780CDW. The 30-sheet feed saves repeated single-sheet loading.
Printing is moderate and special stock is rare
Choose Canon MF665Cdw. Canon meets the color and duplex-scanning brief.
You need a 50-sheet special-stock batch without reloading
Choose neither. Neither secondary input holds 50 sheets. Check supported media too.
What matters in practice
How to make the call
The scanner does not separate these two
Both can capture two sides in one pass from a 50-sheet stack. Buyers focused on incoming forms can keep both on the shortlist and look at how the output side will be used.
A small tray can change a workday
Alternating reports with supported letterhead is less disruptive when the second stock stays loaded. Brother’s 30-sheet multipurpose tray offers that flexibility. Canon’s one-sheet feed favors occasional individual sheets.
Published speed is only part of turnaround
Brother’s 31-ppm rating exceeds Canon’s 26-ppm figure. Those figures describe sustained printing under stated conditions. A five-page job also involves startup and processing, which prevents a simple percentage claim about total waiting time.
Price the supplies for your documents
A mostly black-text workload and a color-heavy presentation workload consume toner differently. Compare the cartridges actually used, their standardized yields and any separate maintenance parts. We do not infer a running-cost winner from cartridge yield alone.
What this comparison cannot tell you
- Rated print speeds are manufacturer figures, not matched hands-on tests.
- Toner yields use standardized test documents and vary with content.
What the facts say
What the comparison shows
Useful conclusions from the current laser printers comparison, followed by the checked facts used to reach them.
See the checked facts and calculation notes
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Canon MF665Cdw |
|
|
|
| Brother MFC-L3780CDW |
|
|
Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
Canon MF665Cdw
You need color and two-sided scanning for ordinary paperwork
See price & reviews on AmazonBrother MFC-L3780CDW
You print color batches regularly
See price & reviews on AmazonLinks open in a new tab.