I've never made a direct comparison, but something that comes to mind, if you had lower contrast negs (you might increase development of the film), you might have printed on a higher contrast paper to compensate, which could have increased grain appearance, maybe not a fair comparison.
Don't want to muddy the waters here, philosophically, but what is really important (to many) is the look and texture of the grain pattern (and of course, other things like tonal quality and feel of the image.)