Hi Fall2020, Both the WF-4830 and WF-7840 have auto document feeders that allow feeding multiple sheets for two-sided scanning and copying. Both will print on photo, matte or plain paper. The most notable difference is that the WF-4830 is smaller, it prints Letter- and Legal-size documents. The WF-7830 is wide format. It prints 13" x 19" and 11" x 17" size sheets. Regards, Mark - The Epson Team.