I love Napa Rose. It is so quiet and picturesque looking out at DCA. I love California Grill, too. You can't beat the fireworks view but it does seem noisier to me -- I think it is just the way it is built.
We eat at Napa Rose every time that we go to DL. Last time we were at WDW we finished with California Grill. We couldn't make California Grill work without missing our favorite restaurant, Jiko, so we won't be there in December. That is one thing that WDW has over DL, a lot more good places to eat!