Are the ink cartridges the same between the Epson Stylus Pro 4800, 7800, and 9800?
No. The Epson Stylus Pro 4800 uses a new ink cartridge design, similar to the Epson Stylus Pro 4000. However, you can use the exact same Matte Black ink cartridge from the Epson Stylus Pro 4000, 7600, or 9600 in the Epson Stylus Pro 4800. The Epson Stylus Pro 7800 and 9800 use a completely new ink cartridge design to support their new pressurized ink delivery system. You can share the ink cartridges between the Epson Stylus Pro 7800 and 9800.