The Pro-10, which sells for $699, uses the Lucia pigment inks, supplemented with the same Chroma Optimizer as the Pro-1, minimizing gloss differential and bronzing of black inks whenever you print on glossy paper. In addition to that, Canon reformulated the yellow ink and claims that there is now increased coverage in the red/magenta/yellow area of the color gamut.
If you are a fan of dyes, then the Pixma Pro-100 is what you will be interested in. This $499 device uses a reconfigured ChromaLife 100+ ink set, dropping the red and green primaries to add gray and light gray. Canon also incorporated a reformulated magenta which, according to the company, "delivers better reds for improved black and shadow reproduction."
Both of these printers have also received increases to print speeds while the drivers also ship with a new Pro mode, designed to deliver more accurate automated color matching. Both printers are expected to be released this October. These devices seem to be optimized for photographers and photo enthusiasts as they have a lot of features that help with the production of pictures.
Source: CNET - Canon updates prosumer photo printer line