The Epson WF-2651 is a multifunction printer targeted at small and home offices.
It can print through the cloud.
It also supports mobile printing, but it has no support for wired internet.

The low paper capacity is partly the reason that the printer is best for personal use.
Both are MFP printers that share nearly identical physical design and construction.
Each of them has 150-sheet paper capacity and 30-sheet output capacity.

Borderless photo printing is supported too, which takes about 82 seconds to produce one.
Their control panel configurations, however, are a bit different from each other.
The most prominent difference is the LCD screen.

While the Epson WF-2651 has a 2.2-inch mono display, the Epson WF-2661 features a 2.7-inch TFT color display.
Connectivity options are slightly different too.
Wireless connection is the most convenient method to connect the printer to other devices.
So, a compatible mobile gear will still be able to dive into the printer directly.
The lack of NFC support is unfortunate, though.
Users who really need it should go for the Epson WF-2661 or look elsewhere.
Epson WF-2651 Driver Free Download
Automatic duplex printing is definitely a plus.
While it doesnt speed up the printing, it reduces the hassle.