Computers / Peripherals / Printers / Max Printing Speed Mono 40, Paper Format B4

HP Color LaserJet CP6015dn  

Laser, 20 ppm color print speed, 40 ppm black print speed, USB / Ethernet, Paper handling support A6 / B6 / A5

HP LaserJet 9040dn (Q7699A)  

Laser, 40 ppm black print speed, USB / Ethernet / Parallel, Paper handling support B6 / A5 / B5, 600 x 600 dpi max resolution