The DCP-315CN is the MFC-425CN's little brother, with many of the same features, including a built-in network card, but no ADF or fax function.
Both the 315CN and the 425CN suffer from the same poor build quality and feel very flimsy. The paper tray design is also clumsy – you have to pull out the entire tray to extend the paper support. On the plus side, each printer uses individual ink tanks, which is an advantage as you just need to change each colour as it runs out.
These are not the only things that the two printers have in common
In use they are identical, with the 315CN turning out text and images in the same time and at the same quality as the 425CN. Even the driver software shares the same glitch, making selecting settings difficult when it goes wrong.
The DCP-315CN has a slightly simplified control panel, with fewer buttons, largely due to the fact that there is no fax machine included.
This model is squarely aimed at the home user, despite the inclusion of a network card, which is an odd addition in a consumer product. However, many homes now have more than one computer, so it could turn out to be useful. However, it pushes up the price of the printer, so it may not be worth the premium, particularly when you consider that Mac OS X includes built-in printer sharing for all USB printers.
As the DCP-315CN shares so much in common with the 425CN we were equally disappointed by this fairly expensive, unimpressive printer.