All or at least very nearly all C prints are made on RC-type papers, and most 'art' inkjet prints are made on non-RC papers with pigment inks, so what you've seen is probably an apples-to-oranges comparison.
All or at least very nearly all C prints are made on RC-type papers, and most 'art' inkjet prints are made on non-RC papers with pigment inks, so what you've seen is probably an apples-to-oranges comparison.