a friend of mine has a 8300s in his Copyshop. His customers are not picky enough to notice a difference between this and the non S version. Canon advertised it as following:
An extremely versatile solution, the 44" imagePROGRAF iPF8300S printer is ideal for those who need quality large format output and maximum productivity. Built for the photography, proofing and production markets, the iPF8300S delivers high quality imaging while increasing overall productivity. Equipped with an 8-Color LUCIA EX ink set, 160GB hard drive, built-in calibration and 44" borderless printing, the iPF8300S is an excellent solution for portraits, advertisements, retail signage and contract proofs.
deal for production grade printing environments, the iPF8300S is up to 40% faster than the 12-Color line of imagePROGRAF Graphic Arts printers. Achieve maximum productivity with large 330ml or 700ml ink tanks and a unique sub-ink tank system for replacing ink on-the-fly without stopping the printer. And with a 160GB hard drive, handling multiple complex jobs is simple, especially in shared printer environments. Finally, minimize your cost per print with Fast/Economy modes that reduce printer ink consumption.