Guess we have a terminology difference so I need to clarify.
I do digital reproductions for several watercolor and acrylic artists.
Almost to a tee their choice of paper for inkjet reprints are on Canson BFK Rives.
From the samples we have printed this gave the look and feel similar to their originals.
Acrylic and oils would be different, but this is why I suggested showing samples to clients. When someone says 'watercolor paper', there is no way of telling what they mean.
The problem with traditional watercolor papers, like Arches Aquarelle, is that once the watercolor goes down, the surface of the paper changes completely - it becomes much softer and less textured. The same effect doesn't happen with inkjet printing on coated papers.
Most watercolor and gouache reproductions I do are on velvet or Hanhemühle German Etching for large sized works. For smaller sized reproductions, BKF Rives is definately popular too.