A:
HP Officejet Pro 8600 e-All-in-One Printer - N911a (CM749A) has:
Up to 32-ppm printer speed
250 sheets input capacity with one tray
2.65-in CGD (color graphics), Touchscreen display
Up to 5.6-ppm scan speed
Up to 32 cpm copy speed
Copies, two-sided, lighter/darker, ID copy, resize, quality, paper size, paper type, collate, margin shift, crop, copy preview, tray select, enhancements
HP Officejet Pro 8600 Plus e-All-in-One Printer - N911g (CM750A) has
Up to 35-ppm
250 sheets input capacity with one tray
4.3-in CGD (color graphics), Touchscreen display
Up to 11-ppm scan speed
Up to 35 cpm copy speed
Copies, two-sided, lighter/darker, HP Copy Fix, ID copy, resize, quality, paper size, paper type, collate, margin shift, crop, copy preview, tray select, enhancements