It's about a lot more than the profiles for me, as already noted. There's a free demo for anyone to make his/her own decision before committing.
I don't print on canvas, but I did find this excerpt from a review of an earlier IP iteration...
"If you are printing on canvas or a rougher surfaced paper, ImagePrint has unique capability in providing four and eight pass printing at 1440 dpi. In this mode, the print heads will make four or eight passes over the same print area and gradually build up the ink to make the image. The dot size for each drop of ink is modulated, as well as its exact placement. In so doing, it creates far more precision and uses far more dots of ink to slowly build up the image while it absorbs into the print surface. Try it!
In 2880 dpi mode, the print method is more direct, but still gradually builds up the image on the paper across the printhead. You can observe the print process on your printer and see how the image is slowly built up across the printhead. By controlling the amount of ink that is applied at each stage, there is more subtlety to, and exactness in, the final print. For me, this is critical in making a fine art print, especially in regard to precision in the lower zones of the image in my monochrome prints."
I have no idea if this is true, or if the results are visible. But it's free to try.
Jeff