I've only stayed at POR but would absolutely recommend it for your honeymoon (or any occasion) My boyfriend and I stayed there this past September and the grounds are absolutely beautiful. We were in AB Bldg 18 room 1839 and it was great! If you are into woodsey type atmosphere, AB is a great option. If you like the "gone with the wind" feeling, then the Mansions are a better bet. We spent a good part of the first day there just walking around the resort and it was breathtaking. Also, they have horse drawn carriage rides that you can take too...great idea for a honeymoon!
My parents have stayed at POFQ and we went over there for lunch one day while we were at WDW this year and the resort is also very nice. I just feel that even though POR is larger in size, it seems more intimate to me with the lush landscaping and such.
I think either way you go, you'll be happy. But I definitly throw in my vote for POR as I love it!
Oh...if you like alcoholic beverages, may I suggest a Miss Melodie's Colada at the River Roost Lounge inside the main building. Absolutely the BEST colada I've ever had in my life! I wish I could get them flown up to MI!