Comparative Test: Color Lasers up to 700 Euros: Dirt collector Samsung
When designing the CLP-610ND, Samsung probably didn´t consider the fact, that A4 paper is 297 millimeters long. The paper tray juts out approximately three centimeters in the printer´s rear, if you use the A4 format. Dust can accumulate there, and paper-clips or the like might fall in.
The Amercan letter size doesn´t have this problem, the tray flushes with the printer´s rear.