I'm just getting in to printing my digital photos, and I've been experimenting with lots of different papers on my HP B9180. Tonight, I printed the same image on Hahnemuhle Photo Rag on 8.5x11 and 13x19. The larger print is much weaker - darks are lighter, generally less depth, less "punch" - even though it's the same paper, same profile, etc. Is this just the nature of digital printing, with the same number of pixels spread over a larger area, or is there something else going on that I can correct?
I'm printing from Lightroom, on a Mac, printer managing color. My monitor is profiled, and I'm using the Hahnemuhle paper profile. It's a D300 image.