No. Not only is it less grainy, it lowers your blood pressure,
gives you a big boost of energy, increases your sex appeal and
raises your salary.

Fibre based, if not ferrotyped, hides a bit of the grain in
the paper texture.  The more texture, the more grain hiding.

When ferrotyped the grain reappears; to my mind the grain shown
in ferrotypeded FB is a nicer - sharper, more even - than what
pops up with the same negative on glossy RC.

Take this with a grain of salt as I think RC paper is a work of
the Devil; OTOH, the Devil easier to dance with. Throw the
salt over your left shoulder.

 Perhaps not. But it's not the paper it's your focusing of the
negative. Any grain you see in a print is from your negative. The
entire matter is some what complex. It envolves the blue to green
band width sensitivity of the two emulsions. They may vary
considerably and so too the focus. What you see when
you focus may not be what you get.

But, if both papers are Graded none of the above applies.
The narrow blue band for which Graded papers are sensitive
and which allows for a high level of darkroom lighting, is common
to all Graded papers. Dan