B9180/Pro 9000 ink usage vs price?

[jljonathan]

If you figure in the cartridge size differences, the price per ml for ink is about the same. So, which printer uses less ink when printing the same size print on similar media? Color and B&W.

Which is best for B&W prints?

[usinare]

for B&W the hp is better. the canon 9000 is great for color prints on glossy and semi glossy paper .