A few years ago, we split our stay between GF and WL. GF is a wonderful place to stay. It was very special and I will always remember it. I'm not sure if we will be able to stay there again for quite awhile. I believe any view will be great. You can always take a walk to the water to see the fireworks or Cindy's Castle if you have a garden view. WL felt more like a regular hotel. It was nice and had a very warm feeling, but like I said, GF is special. You could have the best of both and switch in the middle of your stay. Your luggage is all taken care of and you just have to switch resorts. It was very easy. WL also has the boat ride over to MK, so that is a nice alternative.
All in all, if you are able to stay at GF, I would go for it. It may be a once in a lifetime opportunity.
Have fun!!!